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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=Wicipedia%3APolisi+defnyddio+delweddau&returntoquery=action%3Dedit%26section%3D6" title="Fe'ch anogir i fewngofnodi, er nad oes rhaid gwneud. 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