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data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Prif ddewislen</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">cuddio</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Llywio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage" class="mw-list-item"><a href="/wiki/Hafan" title="Ymweld â'r Hafan [z]" accesskey="z"><span>Hafan</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wicipedia:Porth_y_Gymuned" title="Pethau i'w gwneud, adnoddau a thudalennau'r gymuned"><span>Porth y Gymuned</span></a></li><li id="n-cafe" class="mw-list-item"><a href="/wiki/Wicipedia:Y_Caffi"><span>Y Caffi</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Categori:Materion_cyfoes" title="Gwybodaeth yn gysylltiedig â materion cyfoes"><span>Materion cyfoes</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Arbennig:RecentChanges" title="Rhestr y newidiadau diweddar ar y wici. [r]" accesskey="r"><span>Newidiadau diweddar</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Arbennig:Random" title="Llwytho tudalen ar hap [x]" accesskey="x"><span>Erthygl ar hap</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Wicipedia:Cymorth" title="Tudalennau cymorth"><span>Cymorth</span></a></li><li id="n-specialpages" class="mw-list-item"><a href="/wiki/Arbennig:SpecialPages"><span>Tudalennau arbennig</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Hafan" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wicipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-cy.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="" src="/static/images/mobile/copyright/wikipedia-tagline-cy.svg" width="120" height="13" style="width: 7.5em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Arbennig:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Chwilio Wicipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Chwilio</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Chwilio Wicipedia" aria-label="Chwilio Wicipedia" autocapitalize="sentences" title="Chwilio Wicipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Arbennig:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Chwilio</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Offer personol"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Newidiwch ymddangosiad maint ffont, lled a lliw y dudalen" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Gwedd" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Gwedd</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=cy.wikipedia.org&uselang=cy" class=""><span>Rhoi</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Arbennig:CreateAccount&returnto=Yr+Oesoedd+Canol+Cynnar+yng+Nghymru" title="Rydym yn argymell eich bod yn creu cyfri ac yn menwgofnodi. Fodd bynnag, dydy hyn ddim yn orfodol" class=""><span>Creu cyfrif</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Arbennig:UserLogin&returnto=Yr+Oesoedd+Canol+Cynnar+yng+Nghymru" title="Fe'ch anogir i fewngofnodi, er nad oes rhaid gwneud. [o]" accesskey="o" class=""><span>Mewngofnodi</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Rhagor o opsiynau" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Offer personol" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Offer personol</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal" title="Dewislen defnyddiwr" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=cy.wikipedia.org&uselang=cy"><span>Rhoi</span></a></li><li id="pt-contribute" class="mw-list-item"><a href="/wiki/Arbennig:Contribute"><span class="vector-icon mw-ui-icon-edit mw-ui-icon-wikimedia-edit"></span> <span>Cyfrannu</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Arbennig:CreateAccount&returnto=Yr+Oesoedd+Canol+Cynnar+yng+Nghymru" title="Rydym yn argymell eich bod yn creu cyfri ac yn menwgofnodi. Fodd bynnag, dydy hyn ddim yn orfodol"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Creu cyfrif</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Arbennig:UserLogin&returnto=Yr+Oesoedd+Canol+Cynnar+yng+Nghymru" title="Fe'ch anogir i fewngofnodi, er nad oes rhaid gwneud. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Mewngofnodi</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Tudalennau ar gyfer golygyddion allgofnodedig <a href="/wiki/Cymorth:Cyflwyniad" aria-label="Dysgu mwy am olygu"><span>dysgu mwy</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Arbennig:MyTalk" title="Sgwrs ynglŷn â golygiadau o'r cyfeiriad IP hwn [n]" accesskey="n"><span>Sgwrs</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Safle"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Cynnwys" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Cynnwys</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">cuddio</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Y dechrau</div> </a> </li> <li id="toc-Hanes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Hanes"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Hanes</span> </div> </a> <button aria-controls="toc-Hanes-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toglo is-adran Hanes</span> </button> <ul id="toc-Hanes-sublist" class="vector-toc-list"> <li id="toc-Y_Rhufeiniaid_yn_gadael" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Y_Rhufeiniaid_yn_gadael"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Y Rhufeiniaid yn gadael</span> </div> </a> <ul id="toc-Y_Rhufeiniaid_yn_gadael-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Dylanwad_Cristnogaeth" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Dylanwad_Cristnogaeth"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Dylanwad Cristnogaeth</span> </div> </a> <ul id="toc-Dylanwad_Cristnogaeth-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Teyrnasoedd_cynnar" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Teyrnasoedd_cynnar"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>Teyrnasoedd cynnar</span> </div> </a> <ul id="toc-Teyrnasoedd_cynnar-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ymdrechion_i_uno_Cymru" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Ymdrechion_i_uno_Cymru"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Ymdrechion i uno Cymru</span> </div> </a> <ul id="toc-Ymdrechion_i_uno_Cymru-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Gweler_hefyd" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Gweler_hefyd"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Gweler hefyd</span> </div> </a> <ul id="toc-Gweler_hefyd-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cyfeiriadau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cyfeiriadau"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Cyfeiriadau</span> </div> </a> <ul id="toc-Cyfeiriadau-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Cynnwys" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Tabl Cynnwys" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toglo'r tabl cynnwys" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toglo'r tabl cynnwys</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Yr Oesoedd Canol Cynnar yng Nghymru</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ewch i erthygl mewn iaith arall. Ar gael mewn 6 iaith" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-6" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">6 iaith</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%88%D9%8A%D9%84%D8%B2_%D9%81%D9%8A_%D8%A7%D9%84%D8%B9%D8%B5%D9%88%D8%B1_%D8%A7%D9%84%D9%88%D8%B3%D8%B7%D9%89_%D8%A7%D9%84%D9%85%D8%A8%D9%83%D8%B1%D8%A9" title="ويلز في العصور الوسطى المبكرة - Arabeg" lang="ar" hreflang="ar" data-title="ويلز في العصور الوسطى المبكرة" data-language-autonym="العربية" data-language-local-name="Arabeg" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Wales_in_the_Early_Middle_Ages" title="Wales in the Early Middle Ages - Saesneg" lang="en" hreflang="en" data-title="Wales in the Early Middle Ages" data-language-autonym="English" data-language-local-name="Saesneg" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Pays_de_Galles_au_haut_Moyen_%C3%82ge" title="Pays de Galles au haut Moyen Âge - Ffrangeg" lang="fr" hreflang="fr" data-title="Pays de Galles au haut Moyen Âge" data-language-autonym="Français" data-language-local-name="Ffrangeg" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/An_Bhreatain_Bheag_sa_Mhe%C3%A1naois_Luath" title="An Bhreatain Bheag sa Mheánaois Luath - Gwyddeleg" lang="ga" hreflang="ga" data-title="An Bhreatain Bheag sa Mheánaois Luath" data-language-autonym="Gaeilge" data-language-local-name="Gwyddeleg" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Pa%C3%ADs_de_Gales_no_in%C3%ADcio_da_Idade_M%C3%A9dia" title="País de Gales no início da Idade Média - 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vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Blwch offer</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">cuddio</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Rhagor o opsiynau" > <div class="vector-menu-heading"> Gweithredoedd </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Yr_Oesoedd_Canol_Cynnar_yng_Nghymru"><span>Darllen</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v"><span>Golygu</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e"><span>Golygu cod</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=history"><span>Gweld hanes</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Cyffredinol </div> <div class="vector-menu-content"> <ul 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href="/w/index.php?title=Arbennig:Book&bookcmd=book_creator&referer=Yr+Oesoedd+Canol+Cynnar+yng+Nghymru"><span>Llunio llyfr</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Arbennig:DownloadAsPdf&page=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=show-download-screen"><span>Lawrlwytho fel PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&printable=yes" title="Cynhyrchwch fersiwn o'r dudalen yn barod at ei hargraffu [p]" accesskey="p"><span>Fersiwn argraffu</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Mewn prosiectau eraill </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a 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data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Gwedd</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">cuddio</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Oddi ar Wicipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cy" dir="ltr"><div style="margin-bottom:0.01em; padding: 0.01px; text-align: left; font-size: 100%;"> <dl><dd><span class="boilerplate seealso"><i>Prif: <a href="/wiki/Yr_Oesoedd_Canol_yng_Nghymru" title="Yr Oesoedd Canol yng Nghymru">Yr Oesoedd Canol yng Nghymru</a></i></span></dd></dl></div> <table class="vertical-navbox nowraplinks vcard hlist" cellspacing="5" cellpadding="0" style="float:right;clear:right;width:22.0em;margin:0 0 1.0em 1.0em;background:#f9f9f9;border:1px solid #aaa;padding:0.2em;border-spacing:0.4em 0;text-align:center;line-height:1.4em;font-size:88%;width:18.0em; border: double 4px #8B0000; background:#FFFFFF;;"><tbody><tr><th style="padding:0.2em 0.4em 0.2em;font-size:145%;line-height:1.2em;"><a href="/wiki/Hanes_Cymru" title="Hanes Cymru"><span style="color:#8B0000;">Hanes Cymru</span></a></th></tr><tr><td style="padding:0.2em 0 0.4em;"><span typeof="mw:File"><a href="/wiki/Delwedd:Arms_of_Llywelyn.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Arms_of_Llywelyn.svg/85px-Arms_of_Llywelyn.svg.png" decoding="async" width="85" height="102" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Arms_of_Llywelyn.svg/128px-Arms_of_Llywelyn.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/83/Arms_of_Llywelyn.svg/170px-Arms_of_Llywelyn.svg.png 2x" data-file-width="422" data-file-height="508" /></a></span></td></tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Cynhanes Cymru</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Cynhanes_Cymru" title="Cynhanes Cymru">Cynhanes</a> </li><li><a href="/wiki/Archaeoleg_Cymru" title="Archaeoleg Cymru">Archaeoleg</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Oes y Celtiaid</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Y_Brythoniaid" class="mw-redirect" title="Y Brythoniaid">Brythoniaid</a></li><li> <a href="/wiki/Cyfnod_y_Rhufeiniaid_yng_Nghymru" title="Cyfnod y Rhufeiniaid yng Nghymru">Rhufeiniaid</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Oesoedd Canol</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Yr_Oesoedd_Canol_yng_Nghymru" title="Yr Oesoedd Canol yng Nghymru">Oesoedd Canol</a> </li><li><a class="mw-selflink selflink">Oesoedd Canol Cynnar</a> </li><li><a href="/wiki/Oes_y_Tywysogion" title="Oes y Tywysogion">Oes y Tywysogion</a> </li><li><a href="/wiki/Goresgyniad_Edward_I" title="Goresgyniad Edward I">Goresgyniad</a> </li><li><a href="/wiki/Tywysogaeth_Cymru" title="Tywysogaeth Cymru">Tywysogaeth Cymru</a> </li><li><a href="/wiki/Yr_Oesoedd_Canol_Diweddar_yng_Nghymru" title="Yr Oesoedd Canol Diweddar yng Nghymru">Oesoedd Canol Diweddar</a></li><li><a href="/wiki/Rhyfeloedd_y_Rhosynnau" title="Rhyfeloedd y Rhosynnau">Rhyfeloedd y Rhosynnau</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Cyfnod modern cynnar</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Cyfnod_modern_cynnar_Cymru" title="Cyfnod modern cynnar Cymru">Cyfnod modern cynnar</a></li></ul></div> <a href="/wiki/Gwrachyddiaeth_yng_Nghymru_fodern_gynnar" title="Gwrachyddiaeth yng Nghymru fodern gynnar">Gwrachyddiaeth yng Nghymru</a></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Cyfnod modern</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Hanes_modern_Cymru" title="Hanes modern Cymru">Cyfnod modern</a> </li><li><a href="/wiki/Chwyldro_Diwydiannol_Cymru" title="Chwyldro Diwydiannol Cymru">Chwyldro ddiwydiannol</a> </li><li><a href="/wiki/Cymru_yn_yr_20g" title="Cymru yn yr 20g">20g</a> </li><li><a href="/wiki/Datgysylltu%27r_Eglwys_Anglicanaidd_yng_Nghymru" title="Datgysylltu'r Eglwys Anglicanaidd yng Nghymru">Annibyniaeth yr Eglwys</a> </li><li><a href="/wiki/Y_Rhyfel_Byd_Cyntaf_yng_Nghymru" title="Y Rhyfel Byd Cyntaf yng Nghymru">Rhyfel Byd I</a> </li><li><a href="/wiki/Y_cyfnod_rhwng_y_rhyfeloedd_yng_Nghymru" title="Y cyfnod rhwng y rhyfeloedd yng Nghymru">Rhwng y rhyfeloedd</a> </li><li><a href="/wiki/Yr_Ail_Ryfel_Byd_yng_Nghymru" title="Yr Ail Ryfel Byd yng Nghymru">Rhyfel Byd II</a> <ul><li><a href="/wiki/Y_Blitz_yng_Nghymru" title="Y Blitz yng Nghymru">Y Blitz</a></li></ul> </li><li><a href="/wiki/Datganoli_Cymru" title="Datganoli Cymru">Datganoli</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Teyrnasoedd</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Teyrnas_Deheubarth" title="Teyrnas Deheubarth">Deheubarth</a> </li><li><a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd">Gwynedd</a> </li><li><a href="/wiki/Teyrnas_Morgannwg" title="Teyrnas Morgannwg">Morgannwg</a> </li><li><a href="/wiki/Teyrnas_Powys" title="Teyrnas Powys">Powys</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Pwnc</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Hanes_cyfansoddiadol_Cymru" title="Hanes cyfansoddiadol Cymru">Cyfansoddiadol</a> </li><li><a href="/wiki/Hanes_demograffig_Cymru" title="Hanes demograffig Cymru">Demograffig</a> </li><li><a href="/wiki/Hanes_LHDT_Cymru" title="Hanes LHDT Cymru">LHDT</a> </li><li><a href="/wiki/Hanes_milwrol_Cymru" title="Hanes milwrol Cymru">Milwrol</a> </li><li><a href="/wiki/Hanes_morwrol_Cymru" title="Hanes morwrol Cymru">Morwrol</a> </li><li><a href="/wiki/Hanes_tiriogaethol_Cymru" title="Hanes tiriogaethol Cymru">Tiriogaethol</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Rhestr digwyddiadau</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Rhestr_o_ddigwyddiadau_gwleidyddol_Cymru" title="Rhestr o ddigwyddiadau gwleidyddol Cymru">Gwleidyddol</a> </li><li><a href="/wiki/Rhestr_o_ddigwyddiadau_economaidd_Cymru" title="Rhestr o ddigwyddiadau economaidd Cymru">Economaidd</a> </li><li><a href="/wiki/Rhestr_digwyddiadau_Cymru,_17g" title="Rhestr digwyddiadau Cymru, 17g">17g</a> </li><li><a href="/wiki/Rhestr_digwyddiadau_Cymru,_18g" title="Rhestr digwyddiadau Cymru, 18g">18g</a> </li><li><a href="/wiki/Rhestr_digwyddiadau_Cymru,_19g" title="Rhestr digwyddiadau Cymru, 19g">19g</a> </li><li><a href="/wiki/Rhestr_digwyddiadau_Cymru,_20g" title="Rhestr digwyddiadau Cymru, 20g">20g</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Iaith</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Hanes_y_Gymraeg" title="Hanes y Gymraeg"> Y Gymraeg</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Crefydd</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Derwydd" title="Derwydd">Derwydd</a> </li><li><a href="/wiki/Cristnogaeth_yng_Nghymru" title="Cristnogaeth yng Nghymru">Cristnogaeth</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Llenyddwyr</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Y_Cynfeirdd" title="Y Cynfeirdd">Cynfeirdd</a> </li><li><a href="/wiki/Gogynfeirdd" title="Gogynfeirdd">Gogynfeirdd</a> </li><li><a href="/wiki/Beirdd_y_Tywysogion" title="Beirdd y Tywysogion">Beirdd y Tywysogion</a> </li><li><a href="/wiki/Beirdd_yr_Uchelwyr" title="Beirdd yr Uchelwyr">Beirdd yr Uchelwyr</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Llenyddiaeth</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Y_Cynfeirdd" title="Y Cynfeirdd">Cynfeirdd</a> </li><li><a href="/wiki/Rhyddiaith_Cymraeg_Canol" title="Rhyddiaith Cymraeg Canol">Cymraeg Canol</a> </li><li><a href="/wiki/Llenyddiaeth_Gymraeg_yr_16eg_ganrif" title="Llenyddiaeth Gymraeg yr 16eg ganrif">16g</a> </li><li><a href="/wiki/Llenyddiaeth_Gymraeg_yr_17eg_ganrif" title="Llenyddiaeth Gymraeg yr 17eg ganrif">17g</a> </li><li><a href="/wiki/Llenyddiaeth_Gymraeg_y_18fed_ganrif" title="Llenyddiaeth Gymraeg y 18fed ganrif">18g</a> </li><li><a href="/wiki/Llenyddiaeth_Gymraeg_y_19eg_ganrif" title="Llenyddiaeth Gymraeg y 19eg ganrif">19g</a> </li><li><a href="/wiki/Rhestr_o_ddogfennau_hanesyddol_Cymreig" title="Rhestr o ddogfennau hanesyddol Cymreig">Dogfennau pwysig</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Arweinwyr</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Brenin_y_Brythoniaid" title="Brenin y Brythoniaid">Brenin y Brythoniaid</a> </li><li><a href="/wiki/Brenin_Cymru" title="Brenin Cymru">Brenin Cymru</a> </li><li><a href="/wiki/Tywysog_Cymru" title="Tywysog Cymru">Tywysog Cymru</a> <ul><li><a href="/wiki/Rhestr_o_Dywysogion_a_Brenhinoedd_Cymru" title="Rhestr o Dywysogion a Brenhinoedd Cymru">Rhestr</a></li></ul> </li><li><a href="/wiki/Rhestr_o_Brif_Weinidogion_Cymru" title="Rhestr o Brif Weinidogion Cymru">Prif Weinidog Cymru</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Deddfau pwysig</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Statud_Rhuddlan" title="Statud Rhuddlan">Statud Rhuddlan</a> </li><li><a href="/wiki/Deddfau_Penyd_yn_erbyn_Cymru_1402" title="Deddfau Penyd yn erbyn Cymru 1402">Deddfau Penyd</a> </li><li><a href="/wiki/Deddfau%27r_Cyfreithiau_yng_Nghymru_1536_a_1542" title="Deddfau'r Cyfreithiau yng Nghymru 1536 a 1542">Deddfau 1536 & 1542</a> </li><li>Cyfansoddiadol: <ul><li><a href="/wiki/Deddf_Llywodraeth_Cymru_1998" title="Deddf Llywodraeth Cymru 1998">1998</a></li> <li><a href="/wiki/Deddf_Llywodraeth_Cymru_2006" title="Deddf Llywodraeth Cymru 2006">2006</a></li> <li><a href="/wiki/Deddf_Cymru_2014" title="Deddf Cymru 2014">2014</a></li> <li><a href="/wiki/Deddf_Cymru_2017" title="Deddf Cymru 2017">2017</a></li> <li><a href="/wiki/Deddf_Senedd_ac_Etholiadau_(Cymru)_2020" title="Deddf Senedd ac Etholiadau (Cymru) 2020">2020</a></li></ul> </li><li>Ieithyddol: <ul><li><a href="/wiki/Deddf_Llysoedd_Cymreig_1942" title="Deddf Llysoedd Cymreig 1942">1942</a></li> <li><a href="/wiki/Deddf_yr_Iaith_Gymraeg_1967" title="Deddf yr Iaith Gymraeg 1967">1967</a></li> <li><a href="/wiki/Deddf_yr_Iaith_Gymraeg_1993" title="Deddf yr Iaith Gymraeg 1993">1993</a></li> <li><a href="/wiki/Mesur_y_Gymraeg_(Cymru)_2011" title="Mesur y Gymraeg (Cymru) 2011">2011</a></li> <li><a href="/wiki/Deddf_Cynulliad_Cenedlaethol_Cymru_(Ieithoedd_Swyddogol)_2012" title="Deddf Cynulliad Cenedlaethol Cymru (Ieithoedd Swyddogol) 2012">2012</a></li></ul></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Mytholeg a symbolau</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Draig_Y_Brythoniaid" class="mw-redirect" title="Draig Y Brythoniaid">Draig Y Brythoniaid</a> </li><li><a href="/wiki/Y_Ddraig_Goch" title="Y Ddraig Goch">Draig Goch</a> </li><li><a href="/wiki/Mytholeg_Gymreig" title="Mytholeg Gymreig">Mytholeg</a> </li><li><a href="/wiki/Arfbeisiau_Cymru" title="Arfbeisiau Cymru">Arbeisiau</a> </li><li><a href="/wiki/Rhestr_baneri_Cymru" title="Rhestr baneri Cymru">Baneri</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0 0.1em 0.4em;"> <div class="NavFrame collapsed" style="border:none;padding:0;"><div class="NavHead" style="font-size:105%;background:transparent;text-align:left;text-align:left; background:#FFFFFF; color:#8B0000; border-top:1px solid;">Hanesyddiaeth</div><div class="NavContent" style="font-size:105%;padding:0.2em 0 0.4em;text-align:center;"><div class="hlist plainlist" style="margin-left: 0em;"><ul><li><a href="/wiki/Hanesyddiaeth_Cymru" title="Hanesyddiaeth Cymru">Hanesyddiaeth</a></li></ul></div></div></div></td> </tr><tr><td style="padding:0.3em 0.4em 0.3em;font-weight:bold;border-top: 1px solid #aaa; border-bottom: 1px solid #aaa;;"> <span typeof="mw:File"><a href="/wiki/Delwedd:Flag_of_Wales.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Flag_of_Wales.svg/22px-Flag_of_Wales.svg.png" decoding="async" width="22" height="13" class="mw-file-element" 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(";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><style data-mw-deduplicate="TemplateStyles:r13441239">.mw-parser-output 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abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Nodyn:Hanes_Cymru" title="Nodyn:Hanes Cymru"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Sgwrs_Nodyn:Hanes_Cymru" title="Sgwrs Nodyn:Hanes Cymru"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Arbennig:EditPage/Nodyn:Hanes_Cymru" title="Arbennig:EditPage/Nodyn:Hanes Cymru"><abbr title="Edit this template">e</abbr></a></li></ul></div></td></tr></tbody></table> <p>Mae'r <b>Oesoedd Canol Cynnar yng Nghymru</b> yn ymestyn o tua <a href="/wiki/600" title="600">600</a> hyd at <a href="/wiki/1067" title="1067">1067</a> pan ddechreuodd ymosodiadau'r <a href="/wiki/Normaniaid" title="Normaniaid">Normaniaid</a> ar ororau <a href="/wiki/Cymru" title="Cymru">Cymru</a>. </p><p>Yn nechrau'r cyfnod roedd rhai rhannau o Gymru, yn enwedig <a href="/wiki/Teyrnas_Powys" title="Teyrnas Powys">Powys</a>, yn dod o dan bwysau cynyddol oddi wrth yr <a href="/wiki/Eingl-Sacsoniaid" title="Eingl-Sacsoniaid">Eingl-Sacsoniaid</a>, yn enwedig teyrnas <a href="/wiki/Mersia" title="Mersia">Mersia</a>. Collodd Powys cryn dipyn o'i thiriogaeth, oedd yn arfer ymestyn i'r dwyrain o'r ffin bresennol, gan gynnwys yr hen ganolfan, <a href="/wiki/Pengwern" title="Pengwern">Pengwern</a>. Efallai fod adeiladu <a href="/wiki/Clawdd_Offa" title="Clawdd Offa">Clawdd Offa</a>, yn draddodiadol gan <a href="/wiki/Offa" class="mw-disambig" title="Offa">Offa</a>, brenin Mersia yn yr <a href="/wiki/8g" class="mw-redirect" title="8g">8g</a>, yn dynodi ffin wedi ei chytuno. </p><p>Y cyntaf i deyrnasu dros ran helaeth o Gymru oedd <a href="/wiki/Rhodri_Mawr" title="Rhodri Mawr">Rhodri Mawr</a>, yn wreiddiol yn frenin <a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd">Teyrnas Gwynedd</a>, a daeth yn frenin Powys a <a href="/wiki/Ceredigion" title="Ceredigion">Ceredigion</a> hefyd. Pan fu ef farw, rhannwyd ei deyrnas rhwng ei feibion, ond gallodd ei ŵyr, <a href="/wiki/Hywel_Dda" title="Hywel Dda">Hywel Dda</a>, ffurfio teyrnas <a href="/wiki/Deheubarth" class="mw-redirect" title="Deheubarth">Deheubarth</a> trwy uno teyrnasoedd llai y de-orllewin, ac erbyn <a href="/wiki/942" title="942">942</a> roedd yn frenin ar y rhan fwyaf o Gymru. Yn draddodiadol, cysylltir ef a ffurfio <a href="/wiki/Cyfraith_Hywel" title="Cyfraith Hywel">Cyfraith Hywel</a> trwy alw cyfarfod yn <a href="/wiki/Hendy-gwyn_ar_Daf" class="mw-redirect" title="Hendy-gwyn ar Daf">Hendy-gwyn ar Daf</a>. Pan fu ef farw yn <a href="/wiki/950" title="950">950</a> gallodd ei feibion ddal eu gafael ar Ddeheubarth, ond adfeddiannwyd Gwynedd gan y frenhinllin draddodiadol. </p><p>Erbyn hyn roedd y Llychlynwyr yn ymosod at Gymru, yn enwedig y Daniaid yn y cyfnod rhwng 950 a 1000. Dywedir i Godfrey Haroldson gymeryd dwy fil o gaethion o <a href="/wiki/Ynys_M%C3%B4n" title="Ynys Môn">Ynys Môn</a> yn <a href="/wiki/987" title="987">987</a>, a thalodd brenin Gwynedd, <a href="/wiki/Maredudd_ab_Owain" title="Maredudd ab Owain">Maredudd ab Owain</a>, swm fawr i'r Daniaid i brynu ei bobl yn ôl o gaethiwed. </p><p><a href="/wiki/Gruffudd_ap_Llywelyn" title="Gruffudd ap Llywelyn">Gruffudd ap Llywelyn</a> oedd y teyrn nesaf i allu uno'r teyrnasodd Cymreig. Brenin Gwynedd ydoedd yn wreiddiol, ond erbyn <a href="/wiki/1055" title="1055">1055</a> roedd wedi gwneud ei hun yn frenin bron y cyfan o Gymru ac wedi cipio rhannau o Loegr ger y ffin. Yn <a href="/wiki/1063" title="1063">1063</a> gorchfygwyd ef gan <a href="/wiki/Harold_Godwinson" class="mw-redirect" title="Harold Godwinson">Harold Godwinson</a> a'i ladd gan ei ŵyr ei hun. Rhannwyd ei deyrnas unwaith eto, gyda <a href="/wiki/Bleddyn_ap_Cynfyn" title="Bleddyn ap Cynfyn">Bleddyn ap Cynfyn</a> a'i frawd <a href="/wiki/Rhiwallon_ap_Cynfyn" title="Rhiwallon ap Cynfyn">Rhiwallon</a> yn dod yn frenhinoedd Gwynedd a Phowys. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Hanes">Hanes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&veaction=edit&section=1" title="Golygu'r adran: Hanes" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=edit&section=1" title="Edit section's source code: Hanes"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Y_Rhufeiniaid_yn_gadael">Y Rhufeiniaid yn gadael</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&veaction=edit&section=2" title="Golygu'r adran: Y Rhufeiniaid yn gadael" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=edit&section=2" title="Edit section's source code: Y Rhufeiniaid yn gadael"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:CymruMap.PNG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/CymruMap.PNG/200px-CymruMap.PNG" decoding="async" width="200" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/CymruMap.PNG/300px-CymruMap.PNG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/97/CymruMap.PNG/400px-CymruMap.PNG 2x" data-file-width="514" data-file-height="566" /></a><figcaption>Prif deyrnasoedd y Gymru gynnar</figcaption></figure><p>Dywed <a href="/wiki/Gwyn_Alf_Williams" title="Gwyn Alf Williams">Gwyn Alf Williams</a> y ganwyd Cymru yn 383 pan gadawodd Macsen Gymru sy'n ymddangos yn y gân <a href="/wiki/Yma_o_Hyd_(c%C3%A2n)" title="Yma o Hyd (cân)">Yma o Hyd</a>; ond mae'r rhan fwyaf o haneswyr yn anghytuno â hyn. Erbyn 393, dad-filwriwyd Cymru oherwydd roedd angen mwy o filwyr gan y Rhufeiniaid yn <a href="/wiki/G%C3%A2l" title="Gâl">Gâl</a> ac erbyn 410 gadawodd y catrodau Rhufeinig gan adael dim ond tasgfeistri ar ôl i "fflangellu ysgwyddau'r brodorion" yn ôl <a href="/wiki/Gildas" title="Gildas">Gildas</a>. Erbyn 400 cymysgwyd llawer o Ladin gyda'r <a href="/wiki/Brythoneg" title="Brythoneg">Frythoneg</a> ac fe gyfunwyd y traddodiadau a diwylliant Celtaidd gyda rhai Rhufeinig.<sup id="cite_ref-:02_1-0" class="reference"><a href="#cite_note-:02-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><div class="mw-heading mw-heading3"><h3 id="Dylanwad_Cristnogaeth">Dylanwad Cristnogaeth</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&veaction=edit&section=3" title="Golygu'r adran: Dylanwad Cristnogaeth" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=edit&section=3" title="Edit section's source code: Dylanwad Cristnogaeth"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Yn 440 OC dywed i <a href="/wiki/Sant_Padrig" title="Sant Padrig">Sant Padrig</a> sefydlu eglwys yn <a href="/wiki/Llanbadrig" title="Llanbadrig">Llanbadrig</a> yn Ynys Môn ac yn 470 eglwys lle sefir <a href="/wiki/Eglwys_Tyddewi" class="mw-redirect" title="Eglwys Tyddewi">Eglwys Tyddewi</a> heddiw.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Dywed <a href="/wiki/Nennius" title="Nennius">Nennius</a> i'r <a href="/wiki/Brenin_Arthur" class="mw-redirect" title="Brenin Arthur">Brenin Arthur</a> cael ei arwisgo ag arwyddlun frenhinol gan Dyfrig, esgob Llandaf yn <a href="/wiki/Caerllion" title="Caerllion">Caerllion</a> yn 517 OC cyn arwain y Brythoniaid i ryfel yn erbyn yr Eingl-Sacsoniaid. Claddwyd ef yn Glastonbury (dan reolaeth y Brythoniaid ar y pryd).<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Yn ôl <a href="/wiki/Rhygyfarch_ap_Sulien" title="Rhygyfarch ap Sulien">Rhygyfarch ap Sulien</a>, gwnaed <a href="/wiki/Dewi_Sant" title="Dewi Sant">Dewi Sant</a> yn Archesgob metropolitan Prydain a'r Brythoniaid yn Synod Brefi (<a href="/wiki/Llanddewi_Brefi" title="Llanddewi Brefi">Llanddewi Brefi</a>).<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Teyrnasoedd_cynnar">Teyrnasoedd cynnar</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&veaction=edit&section=4" title="Golygu'r adran: Teyrnasoedd cynnar" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=edit&section=4" title="Edit section's source code: Teyrnasoedd cynnar"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="infobox vcard" style="font-size: 90%; text-align: left;"> <caption style="font-size:1.3em;" class="fn"><b>Teyrnasoedd cynnar y Brythoniaid</b> </caption> <tbody><tr> <td> <div style="float: right; clear: right;"> <div style="position: relative;"> <p><span typeof="mw:File"><a href="/wiki/Delwedd:Cymru_blanc_Tyner.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/cy/thumb/0/0e/Cymru_blanc_Tyner.png/300px-Cymru_blanc_Tyner.png" decoding="async" width="300" height="368" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/cy/0/0e/Cymru_blanc_Tyner.png 1.5x" data-file-width="336" data-file-height="412" /></a></span> </p> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:106px; top: 24px;"><b><a href="/wiki/M%C3%B4n" class="mw-redirect" title="Môn"><span style="color: #000000;">Môn</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:126px; top: 40px;"><b><a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd"><span style="color: #028002;">G</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:134px; top: 52px;"><b><a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd"><span style="color: #028002;">w</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:142px; top: 64px;"><b><a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd"><span style="color: #028002;">y</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:146px; top: 80px;"><b><a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd"><span style="color: #028002;">n</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:154px; top: 96px;"><b><a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd"><span style="color: #028002;">e</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:158px; top: 112px;"><b><a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd"><span style="color: #028002;">d</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:166px; top: 124px;"><b><a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd"><span style="color: #028002;">d</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:178px; top: 40px;"><b><a href="/wiki/Rhos" title="Rhos"><span style="color: #028002;">Rhos</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:214px; top: 40px;"><b><a href="/wiki/Tegeingl" title="Tegeingl"><span style="color: #028002;">Tegeingl</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:178px; top: 64px;"><b><a href="/wiki/Rhufoniog" title="Rhufoniog"><span style="color: #028002;">Rhufoniog</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:178px; top: 64px;"><b><a href="/wiki/Rhufoniog" title="Rhufoniog"><span style="color: #028002;">Rhufoniog</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:106px; top: 140px;"><b><a href="/wiki/Meirionnydd" class="mw-disambig" title="Meirionnydd"><span style="color: #028002;">Meirionnydd</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:170px; top: 104px;"><b><a href="/wiki/Penllyn" title="Penllyn"><span style="color: #028002;">Penllyn</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:194px; top: 88px;"><b><a href="/wiki/Edeirnion" title="Edeirnion"><span style="color: #028002;">Edeyrnion</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:258px; top: 64px;"><b><a href="/wiki/Clawdd_Wat" title="Clawdd Wat"><span style="color: #000000;">Clawdd</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:266px; top: 76px;"><b><a href="/wiki/Clawdd_Wat" title="Clawdd Wat"><span style="color: #000000;">Wat</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:246px; top: 72px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">C</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:250px; top: 84px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">l</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:250px; top: 96px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">a</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:250px; top: 112px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">w</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:250px; top: 128px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">d</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:250px; top: 144px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">d</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:246px; top: 180px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">O</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:250px; top: 192px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">f</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:254px; top: 204px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">f</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:258px; top: 216px;"><b><a href="/wiki/Clawdd_Offa" title="Clawdd Offa"><span style="color: #000000;">a</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:230px; top: 120px;"><b><a href="/wiki/Teyrnas_Powys" title="Teyrnas Powys"><span style="color: #028002;">P</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:230px; top: 144px;"><b><a href="/wiki/Teyrnas_Powys" title="Teyrnas Powys"><span style="color: #028002;">o</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:230px; top: 164px;"><b><a href="/wiki/Teyrnas_Powys" title="Teyrnas Powys"><span style="color: #028002;">w</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:230px; top: 188px;"><b><a href="/wiki/Teyrnas_Powys" title="Teyrnas Powys"><span style="color: #028002;">y</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:230px; top: 208px;"><b><a href="/wiki/Teyrnas_Powys" title="Teyrnas Powys"><span style="color: #028002;">s</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:178px; top: 148px;"><b><a href="/wiki/Arwystli" title="Arwystli"><span style="color: #028002;">Arwystli</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:178px; top: 216px;"><b><a href="/wiki/Buellt" title="Buellt"><span style="color: #028002;">Buellt</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:214px; top: 220px;"><b><a href="/wiki/Elfael" title="Elfael"><span style="color: #028002;">Elfael</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:114px; top: 212px;"><b><a href="/wiki/Teyrnas_Ceredigion" title="Teyrnas Ceredigion"><span style="color: #028002;">Ceredigion</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:178px; top: 264px;"><b><a href="/wiki/Teyrnas_Brycheiniog" title="Teyrnas Brycheiniog"><span style="color: #028002;">Brycheiniog</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:210px; top: 304px;"><b><a href="/wiki/Teyrnas_Morgannwg" title="Teyrnas Morgannwg"><span style="color: #028002;">Morgannwg</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:178px; top: 320px;"><b><a href="/wiki/Glywysing" class="mw-redirect" title="Glywysing"><span style="color: #028002;">Glywysing</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:234px; top: 248px;"><b><a href="/wiki/Ewias" title="Ewias"><span style="color: #028002;">Ewias</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:250px; top: 268px;"><b><a href="/wiki/Erging" title="Erging"><span style="color: #028002;">Erging</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:250px; top: 288px;"><b><a href="/wiki/Teyrnas_Gwent" title="Teyrnas Gwent"><span style="color: #028002;">Gwent</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:114px; top: 252px;"><b><a href="/wiki/Ystrad_Tywi" title="Ystrad Tywi"><span style="color: #028002;">Ystrad Tywi</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:118px; top: 308px;"><b><a href="/wiki/Teyrnas_G%C5%B5yr" title="Teyrnas Gŵyr"><span style="color: #028002;">Gŵyr</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:62px; top: 256px;"><b><a href="/wiki/Teyrnas_Dyfed" title="Teyrnas Dyfed"><span style="color: #028002;">Dyfed</span></a></b></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:6px; top: 352px;"><a href="/wiki/M%C3%B4r_Iwerddon" title="Môr Iwerddon"><span style="color: #48A3B5;"><b>Y Môr Celtaidd</b></span></a></div></div> <div style="font-size: smaller; line-height: 10px;"><div style="position: absolute; left:34px; top: 172px;"><a href="/wiki/Cilometr" title="Cilometr">Cilometr</a></div></div> </div></div></td></tr> <tr> <td align="center"><small>Ffynhonnell: John Gower, <i>The Story of Wales</i> (2013)</small> </td> <td> </td></tr></tbody></table> <p>Dechreodd y cyfnod Eingl-Sacsonaidd ym Mhrydain tua'r 5g a ffurfwyd teyrnasoedd <a href="/wiki/Teyrnas_Powys" title="Teyrnas Powys">Powys</a>, <a href="/wiki/Ystrad_Tywi" title="Ystrad Tywi">Ystrad Tywi</a>, <a href="/wiki/Teyrnas_Gwent" title="Teyrnas Gwent">Gwent</a>, <a href="/wiki/Teyrnas_Dyfed" title="Teyrnas Dyfed">Dyfed</a>, <a href="/wiki/Teyrnas_Gwynedd" title="Teyrnas Gwynedd">Gwynedd</a>, <a href="/wiki/Teyrnas_Morgannwg" title="Teyrnas Morgannwg">Morgannwg</a>, <a href="/wiki/Teyrnas_Ceredigion" title="Teyrnas Ceredigion">Ceredigion</a>, <a href="/wiki/Teyrnas_Brycheiniog" title="Teyrnas Brycheiniog">Brycheiniog</a> ac eraill llai. Yn y 5g symudodd <a href="/wiki/Cunedda" title="Cunedda">Cunedda</a> o <a href="/wiki/Moryd_Forth" title="Moryd Forth">Moryd Forth</a> i lawr i Wynedd a gyrru i ffwrdd setlwyr Gwyddelig o <a href="/wiki/Pen_Llyn" class="mw-redirect" title="Pen Llyn">Ben Llŷn</a>.<sup id="cite_ref-:2_6-0" class="reference"><a href="#cite_note-:2-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Dywed yr aeth <a href="/wiki/Maelgwn_Gwynedd" title="Maelgwn Gwynedd">Maelgwn Gwynedd</a> yn y 6g i'r de o <a href="/wiki/Degannwy" title="Degannwy">Degannwy</a> a gorfodi brenhinoedd eraill i'w gydnabod fel uwch-frenin. Daeth y pennaethiaid i <a href="/wiki/Aberdyfi" title="Aberdyfi">Aberdyfi</a> lle eisteddant ar y traeth mewn cadeiriau, a chael cystadleuaeth pwy fyddai'n aros yno hirach tra bod y llanw yn dod i fewn. Yn ôl y stori, arnofiodd Maelgwn mewn cadair wedi'i wneud o adenydd, gyda cwyr drostynt; ac felly enillodd yr hawl i reoli Prydain gyfan.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p><p>Gwahanwyd y Cymry a'r <a href="/wiki/Cernywiaid" title="Cernywiaid">Cernywiaid</a> ar ol brwydr ger <a href="/wiki/Dyrham" title="Dyrham">Dyrham</a> yn 577 OC. Curwyd <a href="/wiki/Rheged" title="Rheged">Rheged</a> a <a href="/wiki/Gododdin_(teyrnas)" title="Gododdin (teyrnas)">Manaw Gododdin</a> yn yr <a href="/wiki/Yr_Hen_Ogledd" title="Yr Hen Ogledd">Yr Hen Ogledd</a> ond fe lwyddodd teyrnas <a href="/wiki/Ystrad_Clud" title="Ystrad Clud">Ystrad Clud</a> i amddiffyn ei hannibyniaeth tan yr 11g hwyr. Yn y cyfnod hwn, roedd y bardd <a href="/wiki/Aneirin" title="Aneirin">Aneirin</a> yn byw ym mhrifddinas teyrnas Manaw gododdin sef <a href="/wiki/Caeredin" title="Caeredin">Din Eidyn (Caeredin)</a>. Ysgrifennodd y gerdd enwog, <a href="/wiki/Y_Gododdin" title="Y Gododdin">Y Gododdin</a>, yn sôn m frwydro y llwyth Gododdin yn yr Hen Ogledd yn erbyn yr Eingl-Sacsoniaid yn y 590au: </p> <div style="margin-left: 5em" class="poem"> <p>Gwyr a aeth Gatraeth oedd fraeth eu llu<br /> Glasfeydd eu hancwyn a gwenwyn fu<br /> Trichant mewn peiriant yn catau<br /> Ac wedi elwch tawelwch fu... </p> </div> <p>Fe lwyddodd Powys i amddiffyn ei thiroedd rhag deyrnas Eingl-Sacsonaidd <a href="/wiki/Mersia" title="Mersia">Mersia</a> ac fe godwyd <a href="/wiki/Croes_Eliseg" title="Croes Eliseg">Croes Eliseg</a> gan <a href="/wiki/Cyngen_ap_Cadell" title="Cyngen ap Cadell">Cyngen ap Cadell</a> i goffau ymdrechion <a href="/wiki/Elisedd_ap_Gwylog" title="Elisedd ap Gwylog">Elisedd ap Gwylog</a> (ei daid), "Yr Eliseg hwnnw a gasglodd ynghyd etifeddiaeth Powys . . . allan o afael yr Eingl â'i gleddyf ac â thân." Yn yr 8g, fe gododd Aethelbald, brenin Mersia, <a href="/wiki/Clawdd_Wat" title="Clawdd Wat">Glawdd Wat</a> ac yna cododd ei olynydd Offa, <a href="/wiki/Clawdd_Offa" title="Clawdd Offa">Glawdd Offa</a> i gadw Brythoniaid Powys allan.<sup id="cite_ref-:2_6-1" class="reference"><a href="#cite_note-:2-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Ymdrechion_i_uno_Cymru">Ymdrechion i uno Cymru</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&veaction=edit&section=5" title="Golygu'r adran: Ymdrechion i uno Cymru" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=edit&section=5" title="Edit section's source code: Ymdrechion i uno Cymru"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div style="margin-bottom:0.01em; padding: 0.01px; text-align: left; font-size: 100%;"> <dl><dd><span class="boilerplate seealso"><i>Gweler hefyd: <a href="/wiki/Brenin_Cymru" title="Brenin Cymru">Brenin Cymru</a></i></span></dd></dl></div><p>Ar ol i Dŷ Gwynedd gael ei sefydlu gan Cunedda, daeth <a href="/wiki/Rhodri_Mawr" title="Rhodri Mawr">Rhodri Mawr</a> yn frenin arni yn 844 OC a daeth Powys dan ei reolaeth yn yr un flwyddyn ar ôl marwolaeth ei wncl.<sup id="cite_ref-:5_8-0" class="reference"><a href="#cite_note-:5-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Bu farw <a href="/wiki/Cyngen_ap_Cadell" title="Cyngen ap Cadell">Cyngen ap Cadell</a> yn Rhufain yn 854 a nodir darostyngiad olaf Powys i Wynedd yn 881-6. Ar oôl hyn, bodolodd y ddau fel un teyrnas Gogledd Cymru. Daw'r sôn nesaf am Bowys fel teyrnas annibynol yn 1102. <sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> Priododd Rhodri Mawr <a href="/wiki/Angharad_ferch_Meurig" title="Angharad ferch Meurig">Angharad ferch Meurig</a> gan ennill rheolaeth dros teyrnasoedd Ceredigion ac Ystrad Tywi (unwyd dan yr enw <a href="/wiki/Seisyllwg" title="Seisyllwg">Seisyllwg</a>). Rhodri oedd y cyntaf i uno rhannau arwyddocaol o Gymru tan y rhannwyd ei diroedd rhwng ei feibion ar ôl ei farwolaeth.<sup id="cite_ref-:5_8-1" class="reference"><a href="#cite_note-:5-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Yn y flwyddyn 930, galwodd frenin yr Eingl-Sacsoniad Athelstan bron i holl frenhinoedd Cymru i'w lys yn Henffordd a chytunwyd mai'r <a href="/wiki/Afon_Gwy" title="Afon Gwy">Afon Gwy</a> fyddai'r ffin yno. Gorfodwyd termau gwaradwyddus ar y Cymry a phwysleisiwyd statws israddol y frenhiniaeth Gymreig. Dywedir mai hyn ysbrydolodd y gerdd <a href="/wiki/Armes_Prydein" title="Armes Prydein">Armes Prydein</a>.<sup id="cite_ref-:7_10-0" class="reference"><a href="#cite_note-:7-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <figure typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Laws_of_Hywel_Dda_(f.1.v)_King_Hywel_cropped.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/68/Laws_of_Hywel_Dda_%28f.1.v%29_King_Hywel_cropped.jpg/155px-Laws_of_Hywel_Dda_%28f.1.v%29_King_Hywel_cropped.jpg" decoding="async" width="155" height="184" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/68/Laws_of_Hywel_Dda_%28f.1.v%29_King_Hywel_cropped.jpg/233px-Laws_of_Hywel_Dda_%28f.1.v%29_King_Hywel_cropped.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/68/Laws_of_Hywel_Dda_%28f.1.v%29_King_Hywel_cropped.jpg/311px-Laws_of_Hywel_Dda_%28f.1.v%29_King_Hywel_cropped.jpg 2x" data-file-width="695" data-file-height="823" /></a><figcaption><a href="/wiki/Hywel_Dda" title="Hywel Dda">Hywel Dda</a></figcaption></figure> <p>Yn y 10g, etifeddodd <a href="/wiki/Hywel_Dda" title="Hywel Dda">Hywel Dda</a> dde Seisyllwg ac yn 942 fe lwyddodd i uno Cymru gyfan heblaw Morgannwg. Roedd Hywel yn gyfrifol am greu <a href="/wiki/Cyfraith_Hywel" title="Cyfraith Hywel">Cyfraith Cymreig Hywel</a> a bu'r unig frenin Cymreig i gynhyrchu ei arian ei hun gyda "Hywel rex" arnynt. Ar ôl ei farwolaeth yn 950, rhannodd y teyrnasoedd unwaith eto.<sup id="cite_ref-:5_8-2" class="reference"><a href="#cite_note-:5-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Erbyn 1039, fe lwyddodd <a href="/wiki/Gruffudd_ap_Llywelyn" title="Gruffudd ap Llywelyn">Gruffudd ap Llywelyn</a> i gymryd Gwynedd a Phowys.<sup id="cite_ref-:5_8-3" class="reference"><a href="#cite_note-:5-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Yn 1053, mewn cyfarfod gyd <a href="/wiki/Gruffudd_ap_Llywelyn" title="Gruffudd ap Llywelyn">Gruffudd ap Llywelyn</a> yn <a href="/wiki/Beachley" title="Beachley">Beachley</a> ac Edward y Cyffeswr wrth lan Clogwyn Aust ar ochr arall [[Afon Hafren]. Cydnabyddodd Gruffudd oruwch-arglwyddiaeth Edward y Cyffeswr ond doedd dim termau eraill i'w cwrdd.<sup id="cite_ref-:7_10-1" class="reference"><a href="#cite_note-:7-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Yn 1057 fe yrrodd ymaith deyrn Morgannwg ac wrth wneud, unodd Cymru gyfan am y tro cyntaf tan y lladdwyd ef yn 1063 gan <a href="/wiki/Cynan_ab_Iago" title="Cynan ab Iago">Cynan ab Iago</a>.<sup id="cite_ref-:5_8-4" class="reference"><a href="#cite_note-:5-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Yr un flwyddyn, gorfodwyd hanner brodyr Gruffudd, <a href="/wiki/Bleddyn_ap_Cynfyn" title="Bleddyn ap Cynfyn">Bleddyn ap Cynfyn</a> a <a href="/wiki/Rhiwallon_ap_Cynfyn" title="Rhiwallon ap Cynfyn">Rhiwallon ap Cynfyn</a> i dalu gwrogaeth mwy costus i Edward.<sup id="cite_ref-:7_10-2" class="reference"><a href="#cite_note-:7-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Gweler_hefyd">Gweler hefyd</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&veaction=edit&section=6" title="Golygu'r adran: Gweler hefyd" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=edit&section=6" title="Edit section's source code: Gweler hefyd"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Teyrnasoedd_Cymru" title="Teyrnasoedd Cymru">Teyrnasoedd Cymru</a></li> <li><a href="/wiki/Oesoedd_Canol_Cynnar" title="Oesoedd Canol Cynnar">Oesoedd Canol Cynnar</a></li> <li><a href="/wiki/Yr_Oesoedd_Canol_yng_Nghymru" title="Yr Oesoedd Canol yng Nghymru">Yr Oesoedd Canol yng Nghymru</a></li> <li><a href="/wiki/Brythoniaid" title="Brythoniaid">Brythoniaid</a></li> <li><a href="/wiki/Yr_Hen_Ogledd" title="Yr Hen Ogledd">Yr Hen Ogledd</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Cyfeiriadau">Cyfeiriadau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&veaction=edit&section=7" title="Golygu'r adran: Cyfeiriadau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&action=edit&section=7" title="Edit section's source code: Cyfeiriadau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-:02-1"><span class="mw-cite-backlink"><a href="#cite_ref-:02_1-0">↑</a></span> <span class="reference-text"><cite id="CITEREFGower2013" class="citation book">Gower, Jon (2013). <a rel="nofollow" class="external text" href="https://books.google.co.uk/books/about/The_Story_of_Wales.html?id=lhjzWWxL4JgC&redir_esc=y"><i>The Story of Wales</i></a> (yn Saesneg). BBC Books. tt. 37–52. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Arbennig:BookSources/978-1-84990-373-8" title="Arbennig:BookSources/978-1-84990-373-8"><bdi>978-1-84990-373-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Story+of+Wales&rft.pages=37-52&rft.pub=BBC+Books&rft.date=2013&rft.isbn=978-1-84990-373-8&rft.aulast=Gower&rft.aufirst=Jon&rft_id=https%3A%2F%2Fbooks.google.co.uk%2Fbooks%2Fabout%2FThe_Story_of_Wales.html%3Fid%3DlhjzWWxL4JgC%26redir_esc%3Dy&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><style data-mw-deduplicate="TemplateStyles:r8312344">.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}</style></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><cite id="CITEREFCathrall1860" class="citation book">Cathrall, William (1860). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=M7YHAAAAQAAJ&newbks=0&hl=cy"><i>A guide through North Wales, including Anglesey, Caernarvonshire, Denbighshire, Flintshire ... with a notice of the geology of the country, by A.C. Ramsay</i></a> (yn Saesneg). t. 190.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=A+guide+through+North+Wales%2C+including+Anglesey%2C+Caernarvonshire%2C+Denbighshire%2C+Flintshire+...+with+a+notice+of+the+geology+of+the+country%2C+by+A.C.+Ramsay&rft.pages=190&rft.date=1860&rft.aulast=Cathrall&rft.aufirst=William&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DM7YHAAAAQAAJ%26newbks%3D0%26hl%3Dcy&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><cite id="CITEREFHughes1894" class="citation book">Hughes, William (1894). <a rel="nofollow" class="external text" href="https://books.google.co.uk/books?id=LAspAAAAYAAJ&newbks=0&printsec=frontcover&dq=oldest+church+in+wales&hl=cy&source=newbks_fb&redir_esc=y#v=onepage&q&f=false"><i>A History of the Church of the Cymry: From the Earliest Period to the Present Time</i></a> (yn Saesneg). E. Stock.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=A+History+of+the+Church+of+the+Cymry%3A+From+the+Earliest+Period+to+the+Present+Time&rft.pub=E.+Stock&rft.date=1894&rft.aulast=Hughes&rft.aufirst=William&rft_id=https%3A%2F%2Fbooks.google.co.uk%2Fbooks%3Fid%3DLAspAAAAYAAJ%26newbks%3D0%26printsec%3Dfrontcover%26dq%3Doldest%2Bchurch%2Bin%2Bwales%26hl%3Dcy%26source%3Dnewbks_fb%26redir_esc%3Dy%23v%3Donepage%26q%26f%3Dfalse&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><cite id="CITEREFHughes1894" class="citation book">Hughes, William (1894). <a rel="nofollow" class="external text" href="https://books.google.co.uk/books?id=LAspAAAAYAAJ&newbks=0&printsec=frontcover&dq=oldest+church+in+wales&hl=cy&source=newbks_fb&redir_esc=y#v=onepage&q&f=false"><i>A History of the Church of the Cymry: From the Earliest Period to the Present Time</i></a> (yn Saesneg). E. Stock. tt. 62–63.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=A+History+of+the+Church+of+the+Cymry%3A+From+the+Earliest+Period+to+the+Present+Time&rft.pages=62-63&rft.pub=E.+Stock&rft.date=1894&rft.aulast=Hughes&rft.aufirst=William&rft_id=https%3A%2F%2Fbooks.google.co.uk%2Fbooks%3Fid%3DLAspAAAAYAAJ%26newbks%3D0%26printsec%3Dfrontcover%26dq%3Doldest%2Bchurch%2Bin%2Bwales%26hl%3Dcy%26source%3Dnewbks_fb%26redir_esc%3Dy%23v%3Donepage%26q%26f%3Dfalse&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><cite id="CITEREFWade-Evans1923" class="citation book">Wade-Evans, Arthur W. (Arthur Wade) (1923). <a rel="nofollow" class="external text" href="http://archive.org/details/MN5136ucmf_5"><i>Life of St. David [microform]</i></a>. Internet Archive. London : Society for Promoting Christian Knowledge; New York, Macmillan. tt. 24–27, 32.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Life+of+St.+David+%5Bmicroform%5D&rft.pages=24-27%2C+32&rft.pub=London+%3A+Society+for+Promoting+Christian+Knowledge%3B+New+York%2C+Macmillan&rft.date=1923&rft.aulast=Wade-Evans&rft.aufirst=Arthur+W.+%28Arthur+Wade%29&rft_id=http%3A%2F%2Farchive.org%2Fdetails%2FMN5136ucmf_5&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-:2-6"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-:2_6-0">6.0</a></sup> <sup><a href="#cite_ref-:2_6-1">6.1</a></sup></span> <span class="reference-text"><cite id="CITEREFGower2013" class="citation book">Gower, Jon (2013). <a rel="nofollow" class="external text" href="https://books.google.co.uk/books/about/The_Story_of_Wales.html?id=lhjzWWxL4JgC&redir_esc=y"><i>The Story of Wales</i></a> (yn Saesneg). BBC Books. tt. 53–66. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Arbennig:BookSources/978-1-84990-373-8" title="Arbennig:BookSources/978-1-84990-373-8"><bdi>978-1-84990-373-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Story+of+Wales&rft.pages=53-66&rft.pub=BBC+Books&rft.date=2013&rft.isbn=978-1-84990-373-8&rft.aulast=Gower&rft.aufirst=Jon&rft_id=https%3A%2F%2Fbooks.google.co.uk%2Fbooks%2Fabout%2FThe_Story_of_Wales.html%3Fid%3DlhjzWWxL4JgC%26redir_esc%3Dy&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">↑</a></span> <span class="reference-text"><cite id="CITEREFEdwards1901" class="citation book">Edwards, Owen Morgan (1901). <a rel="nofollow" class="external text" href="http://archive.org/details/walesedwards00edwaiala"><i>Wales</i></a>. University of California Libraries. London : Unwin ; New York : Putnam's. tt. 27–28.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Wales&rft.pages=27-28&rft.pub=London+%3A+Unwin+%3B+New+York+%3A+Putnam%27s&rft.date=1901&rft.aulast=Edwards&rft.aufirst=Owen+Morgan&rft_id=http%3A%2F%2Farchive.org%2Fdetails%2Fwalesedwards00edwaiala&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-:5-8"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-:5_8-0">8.0</a></sup> <sup><a href="#cite_ref-:5_8-1">8.1</a></sup> <sup><a href="#cite_ref-:5_8-2">8.2</a></sup> <sup><a href="#cite_ref-:5_8-3">8.3</a></sup> <sup><a href="#cite_ref-:5_8-4">8.4</a></sup></span> <span class="reference-text"><cite id="CITEREFGower2013" class="citation book">Gower, Jon (2013). <a rel="nofollow" class="external text" href="https://books.google.co.uk/books/about/The_Story_of_Wales.html?id=lhjzWWxL4JgC&redir_esc=y"><i>The Story of Wales</i></a> (yn Saesneg). BBC Books. tt. 67–82. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Arbennig:BookSources/978-1-84990-373-8" title="Arbennig:BookSources/978-1-84990-373-8"><bdi>978-1-84990-373-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Story+of+Wales&rft.pages=67-82&rft.pub=BBC+Books&rft.date=2013&rft.isbn=978-1-84990-373-8&rft.aulast=Gower&rft.aufirst=Jon&rft_id=https%3A%2F%2Fbooks.google.co.uk%2Fbooks%2Fabout%2FThe_Story_of_Wales.html%3Fid%3DlhjzWWxL4JgC%26redir_esc%3Dy&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><a href="#cite_ref-9">↑</a></span> <span class="reference-text"><cite id="CITEREFDavies2016" class="citation book">Davies, Sean (2016-10-20). <a rel="nofollow" class="external text" href="https://www.google.co.uk/books/edition/The_First_Prince_of_Wales/NeyVDwAAQBAJ?hl=cy&gbpv=0"><i>The First Prince of Wales?: Bleddyn ap Cynfyn, 1063-75</i></a> (yn Saesneg). University of Wales Press. t. 2. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Arbennig:BookSources/978-1-78316-937-5" title="Arbennig:BookSources/978-1-78316-937-5"><bdi>978-1-78316-937-5</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+First+Prince+of+Wales%3F%3A+Bleddyn+ap+Cynfyn%2C+1063-75&rft.pages=2&rft.pub=University+of+Wales+Press&rft.date=2016-10-20&rft.isbn=978-1-78316-937-5&rft.aulast=Davies&rft.aufirst=Sean&rft_id=https%3A%2F%2Fwww.google.co.uk%2Fbooks%2Fedition%2FThe_First_Prince_of_Wales%2FNeyVDwAAQBAJ%3Fhl%3Dcy%26gbpv%3D0&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-:7-10"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-:7_10-0">10.0</a></sup> <sup><a href="#cite_ref-:7_10-1">10.1</a></sup> <sup><a href="#cite_ref-:7_10-2">10.2</a></sup></span> <span class="reference-text"><cite id="CITEREFDavies2016" class="citation book">Davies, Sean (2016-10-20). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=NeyVDwAAQBAJ&newbks=0&printsec=frontcover&dq=bleddyn+ap+cynfyn+prince&hl=cy"><i>The First Prince of Wales?: Bleddyn ap Cynfyn, 1063-75</i></a> (yn Saesneg). University of Wales Press. tt. 23–26. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Arbennig:BookSources/978-1-78316-937-5" title="Arbennig:BookSources/978-1-78316-937-5"><bdi>978-1-78316-937-5</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+First+Prince+of+Wales%3F%3A+Bleddyn+ap+Cynfyn%2C+1063-75&rft.pages=23-26&rft.pub=University+of+Wales+Press&rft.date=2016-10-20&rft.isbn=978-1-78316-937-5&rft.aulast=Davies&rft.aufirst=Sean&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DNeyVDwAAQBAJ%26newbks%3D0%26printsec%3Dfrontcover%26dq%3Dbleddyn%2Bap%2Bcynfyn%2Bprince%26hl%3Dcy&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AYr+Oesoedd+Canol+Cynnar+yng+Nghymru" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> </ol></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Wedi dod o "<a dir="ltr" href="https://cy.wikipedia.org/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&oldid=13270942">https://cy.wikipedia.org/w/index.php?title=Yr_Oesoedd_Canol_Cynnar_yng_Nghymru&oldid=13270942</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Arbennig:Categories" title="Arbennig:Categories">Categorïau</a>: <ul><li><a href="/wiki/Categori:Yr_Oesoedd_Canol_yng_Nghymru" title="Categori:Yr Oesoedd Canol yng Nghymru">Yr Oesoedd Canol yng Nghymru</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Categori cudd: <ul><li><a href="/wiki/Categori:CS1_Saesneg-language_sources_(en)" title="Categori:CS1 Saesneg-language sources (en)">CS1 Saesneg-language sources (en)</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Golygwyd y dudalen hon ddiwethaf ar 2 Tachwedd 2024, am 12:03.</li> <li id="footer-info-copyright">Mae'r testun ar gael o dan <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-ShareAlike License</a>; gall telerau ychwanegol fod yn berthnasol. 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