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margin:10px;"><a class="nohover" href="/wiki/Privacy#Open"><img src="/images/icons/privacy60.png.pagespeed.ce.40ChhYgHYM.png" title="Privacy Level: Open" alt="Privacy Level: Open (White)" width="60" height="60" border="0"></a> </span> <h1> <span itemprop="name">William McMahon GCMG CH PC</span> (1908 - 1988) </h1> </div> </div>  </div> <div class="container full-width"> <div id="ancestorTreeContainer" style="display:none;"></div> </div> <div id="content" class="container"> <div class="sixteen columns"> <div id="descendantsContainer" style="display:none;"></div> </div> <div class="ten columns"> <div class="VITALS"><span class="large"> <strong><span itemprop="honorificPrefix">Sir</span></strong> <strong><span itemprop="givenName">William</span></strong> <strong>"Billy"</strong> <meta itemprop="familyName" content="McMahon"/> <strong><a href="/genealogy/MCMAHON" title="Click here for the surname index page">McMahon</a></strong> <strong><span itemprop="honorificSuffix">GCMG CH PC</span></strong> </span></div> <div class="VITALS">Born <strong><time itemprop="birthDate" datetime="1908-02-23">23 Feb 1908</time></strong> in <strong><span itemprop="birthPlace" itemscope itemtype="https://schema.org/Place"><span itemprop="name">Redfern, New South Wales, Australia</span></span></strong><a href="https://maps.google.com/maps?q=Redfern, New South Wales, Australia" target="_map"><img src="/images/icons/map.gif.pagespeed.ce.dRGS_qcAFb.gif" border="0" width="12" height="11" alt="map"></a></div> <span data-mid="7586349" class="showHideTree button small" style="float:right; clear:right; margin-left:5px; padding:3px;" title="Ancestors in a pedigree-style family tree chart">Ancestors <img src="/images/icons/pedigree.gif.pagespeed.ce.4kSwuvQoBH.gif" border="0" width="8" height="11" alt="ancestors"></span> <div class="VITALS">Son<meta itemprop="gender" content="male"/> of <span itemprop="parent" itemscope itemtype="http://schema.org/Person"><a href="/wiki/McMahon-984" itemprop="url" title="Father: b. 1875 Redfern, New South Wales, Australia son of &nearr; James McMahon &searr; Mary Coyle"><span itemprop="name">William Daniel McMahon</span></a></span> and <span itemprop="parent" itemscope itemtype="http://schema.org/Person"><a href="/wiki/Walder-102" itemprop="url" title="Mother: b. 1877 Sydney, New South Wales, Australia daughter of &nearr; Samuel Walder &searr; Mary Ann Hatton"><span itemprop="name">Mary Ellen Amelia (Walder) McMahon</span></a></span> </div>  <div class="VITALS">Brother of <span itemprop="sibling" itemscope itemtype="http://schema.org/Person"><a href="/wiki/McMahon-2363" itemprop="url" title="brother b. 1905 Sydney, New South Wales, Australia"><span itemprop="name">James McMahon</span></a></span>, <span itemprop="sibling" itemscope itemtype="http://schema.org/Person"><a href="/wiki/McMahon-2366" itemprop="url" title="brother b. 1906 Redfern, New South Wales, Australia"><span itemprop="name">James McMahon</span></a></span>, <span itemprop="sibling" itemscope itemtype="http://schema.org/Person"><a href="/wiki/McMahon-2364" itemprop="url" title="brother b. 1910 Randwick, New South Wales, Australia"><span itemprop="name">Samuel Arthur McMahon</span></a></span> and <span itemprop="sibling" itemscope itemtype="http://schema.org/Person"><a href="/wiki/McMahon-2365" itemprop="url" title="sister b. 1911 Randwick, New South Wales, Australia"><span itemprop="name">Agnes M McMahon</span></a></span> </div> <div class="VITALS">Husband of <span itemprop="spouse" itemscope itemtype="https://schema.org/Person"><a href="/wiki/Hopkins-4070" itemprop="url" title="wife b. 1932-08-01 Strathfield, New South Wales, Australia"><span itemprop="name"><strong>Sonia Rachel (Hopkins) McMahon</strong></span></a></span> — married 11 Dec 1965 in Darling Point, New South Wales, Australia<a href="https://maps.google.com/maps?q=Darling Point, New South Wales, Australia" target="_map"><img src="/images/icons/map.gif.pagespeed.ce.dRGS_qcAFb.gif" border="0" width="12" height="11" alt="map"></a> </div>  <div class="VITALS">Father of <span title="Daughter: [private] ">[private daughter <span class="SMALL">(1960s - unknown)</span>]</span>, <span itemprop="children" itemscope itemtype="http://schema.org/Person"><a href="/wiki/McMahon-2367" itemprop="url" title="Son: b. 1960s "><span itemprop="name">Julian McMahon</span></a></span> and <span title="Daughter: [private] ">[private daughter <span class="SMALL">(1970s - unknown)</span>]</span> </div> <div class="VITALS">Died <strong><time itemprop="deathDate" datetime="1988-03-31">31 Mar 1988</time></strong> <span title="Born 116 years ago; died at age 80">at age 80</span> in <strong><span itemprop="deathPlace" itemscope itemtype="https://schema.org/Place"><span itemprop="name">Potts Point, New South Wales, Australia</span></span></strong><a href="https://maps.google.com/maps?q=Potts Point, New South Wales, Australia" target="_map"><img src="/images/icons/map.gif.pagespeed.ce.dRGS_qcAFb.gif" border="0" width="12" height="11" alt="map"></a> </div> <div class="SMALL" style="background-color:#ffe183;"> <span class="problemQuestionLink button small" data-mnamedb="McMahon-898" style="float:right; clear:right; margin:2px; padding:3px;" title="Open Problems and Questions Guide">Problems/Questions</span> <span title="The manager cares for the profile and leads the collaboration">Profile manager</span>: <a href="/wiki/WikiTree-37" title="Click to visit Australia Project's WikiTree profile">Australia Project WikiTree</a> <a href="#" class="privateMessageLink" data-who="12697640" data-ref="7888222" rel="nofollow" title="Send a private message to Australia Project about this profile"><img src="/images/icons/mail.gif.pagespeed.ce.Q4d4kzofWu.gif" border="0" width="15" height="11" alt="private message"/></a> [<a href="#" class="privateMessageLink" data-who="12697640" data-ref="7888222" rel="nofollow" title="Send a private message to Australia Project about this profile">send private message</a>] </div> <div class="SMALL" style="background-color:#e1efbb;">Profile last modified <time itemprop="modifiedDate" datetime="2024-11-21">21 Nov 2024</time> | Created 23 Mar 2014</div><div class="SMALL" style="background-color:#eee;">This page has been accessed 3,945 times.</div> <div style="clear:both;"></div> <div class="projectbox"><table><tr><td valign="center"> <table style="float:left; margin: 0 5px 0 0;width:75px"> <tr> <td> <a href="https://www.wikitree.com/wiki/Project:Australia"><img alt="Australian flag" src="/photo.php/thumb/7/77/Flags-5.png/75px-Flags-5.png" width="75" height="38" border="0" class="scale-with-grid"/></a> </td></tr> </table></td><td valign="center">William McMahon GCMG CH PC is managed by the Australia Project.<br/>Join: <a href="/wiki/Project:Australia" title="Project:Australia">Australia Project</a><br/>Discuss: <a href="https://www.wikitree.com/g2g/tag/australia" class="external text" title="https://www.wikitree.com/g2g/tag/australia" rel="nofollow"><span class="TAG">australia</span></a></td></tr></table></div> <div style="border: 3px solid #ddd; background-color: #f9f9f9; margin: 3em auto; font-size: 95%; clear:both; width: 98%;padding-bottom:5px;"><div style="display: flex; align-items: center; justify-content: center; padding-top:5px;pointer-events: none;cursor: default;text-decoration: none;color: black;"><a href="/wiki/Image:ADWP2-292.png" class="image" title="ADWP2-292.png"><img alt="" src="/photo.php/thumb/6/61/ADWP2-292.png/75px-ADWP2-292.png" width="75" height="58" border="0" class="scale-with-grid"/></a></div><div style="display: flex; justify-content: space-evenly; text-align: center;"><div style="flex: 1; padding-top:5px;"><b>Preceded by</b><br/><a href="/wiki/Gorton-492" title="Gorton-492">John Gorton</a></div><div style="flex: 1; padding-top:5px;"><b>20th <a href="/wiki/Category:Australia%2C_Prime_Ministers" title="Category:Australia, Prime Ministers">Prime Minister of Australia</a></b><br/>10 Mar 1971 – 5 Dec 1972</div><div style="flex: 1; padding-top:5px;"><b>Succeeded by</b><br/><a href="/wiki/Whitlam-8" title="Whitlam-8">Gough Whitlam</a></div></div></div> <a name="Biography"></a><h2> <span class="mw-headline"> Biography </span></h2><div style="width:250px; min-height:50px; float:right; clear:right; display: flex; align-items: center; margin:2px 2px 2px 20px; border-style: solid; border-width: 1px; border-color: #ccc; box-shadow: 1px 1px 2px #888888;"><div style="display: flex; align-items=stretch;"><div style="min-width:50px; margin:0px 5px 0px 2px; display: flex; flex-direction: column; justify-content: space-around;"><a href="/wiki/Project:Notables"><img alt="Notables Project" src="/photo.php/a/a2/WikiTree_Image_Library-37.png" width="50" height="50" border="0" class="scale-with-grid"/></a></div></div><div class="SMALL">William McMahon GCMG CH PC is Notable.</div></div> <p>Sir William 'Billy' McMahon was an Australian solicitor, soldier and politician. He was 63 when he became the twentieth <a href="/wiki/Category:Australia%2C_Prime_Ministers" title="Category:Australia, Prime Ministers">Prime Minister of Australia</a>. He stayed in office for 21 months, during which time he announced the withdrawal of Australian troops from Vietnam. His Liberal-Country Party coalition government – in power non-stop for 23 years – was ever-so-narrowly defeated in the 1972 general election. </p> <hr/> <table style="margin-left:auto;margin-right:auto;"> <tr> <td style="text-align:center;"><a href="/wiki/Image:McMahon-898.jpg" class="image" title="McMahon-898.jpg"><img alt="" src="/photo.php/thumb/9/9b/McMahon-898.jpg/219px-McMahon-898.jpg" width="219" height="300" border="0" class="scale-with-grid"/></a> </td></tr> <tr> <td style="text-align:center;font-size:90%;"> </td></tr></table> <div style="width:250px; min-height:50px; float:right; clear:right; display: flex; align-items: center; margin:2px 2px 2px 20px; border-style: solid; border-width: 1px; border-color: #ccc; box-shadow: 1px 1px 2px #888888;"><div style="display: flex; align-items=stretch;"><div style="min-width:50px; margin:0px 5px 0px 2px; display: flex; flex-direction: column; justify-content: space-around;"><a href="/wiki/Image:Flags_of_Australian-3.png" class="image" title="New South Wales flag"><img alt="New South Wales flag" src="/photo.php/thumb/f/fa/Flags_of_Australian-3.png/50px-Flags_of_Australian-3.png" width="50" height="25" border="0" class="scale-with-grid"/></a></div></div><div class="SMALL">William McMahon GCMG CH PC was born in New South Wales, Australia</div></div> <div style="width:250px; min-height:50px; float:right; clear:right; display: flex; align-items: center; margin:2px 2px 2px 20px; border-style: solid; border-width: 1px; border-color: #ccc; box-shadow: 1px 1px 2px #888888;"><div style="display: flex; align-items=stretch;"><div style="min-width:50px; margin:0px 5px 0px 2px; display: flex; flex-direction: column; justify-content: space-around;"><a href="/wiki/Image:FIFW-3.jpg" class="image" title="FIFW-3.jpg"><img alt="" src="/photo.php/thumb/5/51/FIFW-3.jpg/50px-FIFW-3.jpg" width="50" height="48" border="0" class="scale-with-grid"/></a></div></div><div class="SMALL">William was a Solicitor</div></div> <div style="width:250px; min-height:50px; float:right; clear:right; display: flex; align-items: center; margin:2px 2px 2px 20px; border-style: solid; border-width: 1px; border-color: #ccc; box-shadow: 1px 1px 2px #888888;"><div style="display: flex; align-items=stretch;"><div style="min-width:50px; margin:0px 5px 0px 2px; display: flex; flex-direction: column; justify-content: space-around;"><a href="/wiki/Image:Military_Badges_and_Insignia-23.png" class="image" title="Military Badges and Insignia-23.png"><img alt="" src="/photo.php/thumb/2/27/Military_Badges_and_Insignia-23.png/50px-Military_Badges_and_Insignia-23.png" width="50" height="38" border="0" class="scale-with-grid"/></a></div></div><div class="SMALL">William McMahon GCMG CH PC is a Military Veteran.<br/> Served in the Australian Army 1940-1945<br/> Headquarters II Corps; Headquarters 2nd Army</div></div> <p><b>William 'Billy' McMahon</b> was born in Sydney's inner southern suburbs, New South Wales, on 23 February 1908. He was the second surviving son of <a href="/wiki/McMahon-984" title="McMahon-984">William Daniel McMahon</a>, a law clerk or solicitor, and <a href="/wiki/Walder-102" title="Walder-102">Mary Ellen Walder</a>. <sup id="_ref-0" class="reference"><a href="#_note-0" title="">[1]</a></sup> His mother died when he was nine years of age. Billy's maternal uncle, <a href="/wiki/Walder-156" title="Walder-156">Samuel Walder</a>, who was at one time Lord Mayor of Sydney, then raised him. His older brother, <a href="/wiki/McMahon-2366" title="McMahon-2366">James</a>, died in 1919 and his father in 1926. </p><p>Billy was educated at Abbotsholme College and Sydney Grammar School, followed by St Paul's College, University of Sydney from which he graduated with a Bachelor of Law (LLB). He practised as a solicitor with the legal firm Allen, Allen & Hemsley, where (Sir) Norman Cowper influenced his political thinking. He became a partner from 1939 to 1941. </p><p>On 26 April 1940, Billy was commissioned as an officer in the Australian Military Force (Militia). In the October he transferred to the expeditionary Second Australian Imperial Force (AIF), for active service overseas throughout the Second World War. His next-of-kin was listed as <a href="/wiki/McMahon-2364" title="McMahon-2364">Samuel McMahon</a>, his younger brother. As he was classified medically unfit for overseas service because of chronic catarrh that impaired his hearing, utilising his legal experience and knowledge, Billy was employed on staff duties in Australia – as deputy assistant quartermaster general (movements) at Headquarters II Corps (1942-43) and Headquarters 2nd Army (1943-45). He gained promotions to Captain in 1942 and to Major the following year. He was placed on the Reserve of Officers on 10th October 1945, after war's end. <sup id="_ref-1" class="reference"><a href="#_note-1" title="">[2]</a></sup><sup id="_ref-2" class="reference"><a href="#_note-2" title="">[3]</a></sup> </p><p>After making an extensive tour of Europe to observe the problems created by the Second World War, Billy returned to the University of Sydney and graduated in 1949 with a Bachelor of Economics (BEc). </p><p>William McMahon was elected to federal parliament as the Liberal member the Sydney electorate of Lowe in 1949, which he held for 32 years until January 1982. He never lived in the electorate, however. He served in many portfolios under the governments of <a href="/wiki/Menzies-170" title="Menzies-170">Robert Menzies</a>, <a href="/wiki/Holt-2480" title="Holt-2480">Harold Holt</a> and <a href="/wiki/Gorton-492" title="Gorton-492">John Gorton</a>, including those responsible for Social Services (1954-56), Primary Industry (1956-58), Labour and National Service (1958-66), Navy (1961-64), Treasurer (1966-69) and Foreign Affairs (1969-71). From 1964 to 1966 he was vice-president of the Executive Council. </p><p>Billy married attractive and vivacious <a href="/wiki/Hopkins-4070" title="Hopkins-4070"><b>Sonia Hopkins</b></a>, an occupational therapist and film production assistant, on 11 December 1965 in St Mark’s Church of England (now Anglican Church), Darling Point, in Sydney's affluent inner eastern suburbs. <sup id="_ref-3" class="reference"><a href="#_note-3" title="">[4]</a></sup> Billy was then 57 years of age and Sonia 33. The couple subsequently had a son and two daughters. </p> <table style="margin-left:auto;margin-right:auto;"> <tr> <td style="text-align:center;"><a href="/wiki/Image:McMahon-2368.jpg" class="image" title="McMahon-2368.jpg"><img alt="" src="/photo.php/thumb/7/79/McMahon-2368.jpg/300px-McMahon-2368.jpg" width="300" height="225" border="0" class="scale-with-grid"/></a> </td></tr> <tr> <td style="text-align:center;font-size:90%;padding-bottom:1em;">Former Prime Minister Sir William McMahon,<br/>wife Lady Sonia McMahon and children Julian, Debbie and Melinda, c1979 </td></tr></table> <p>Billy was elected deputy leader of the parliamentary Liberal Party when <a href="/wiki/Holt-2480" title="Holt-2480">Holt</a> succeeded the retiring <a href="/wiki/Menzies-170" title="Menzies-170">Menzies</a> as Prime Minister in January 1966. He was appointed Privy Councillor (PC) in 1966. With McEwan refusing to support him as Leader in 1967, <a href="/wiki/Gorton-492" title="Gorton-492">Gorton</a> became Leader and Prime Minister following Holt's disappearance until Billy replaced him (after McEwan's retirement) in March 1971. He was named New South Wales Father of the Year in 1971. In the New Year Honours 1972 he was appointed to the Order of the Companion of Honour (CH). <sup id="_ref-4" class="reference"><a href="#_note-4" title="">[5]</a></sup> In the December 1972 Federal election, the Liberal Party-Country Party coalition lost government to the Australian Labor Party. In the Queen's Birthday Honours 1977 he was created Knight Grand Cross of the Order of St Michael and St George (GCMG) (1977). <sup id="_ref-5" class="reference"><a href="#_note-5" title="">[6]</a></sup> Remaining in parliament until 4 January 1982, Billy was a frequent commentator on economic and political issues, offering advice and criticising both the government and Opposition. </p><p>In retirement he travelled, and worked as a consultant to the Bank of America. </p><p>Sir William passed away on 31 March 1988 in Potts Point and his remains cremated and ashes given to family. <sup id="_ref-6" class="reference"><a href="#_note-6" title="">[7]</a></sup><sup id="_ref-7" class="reference"><a href="#_note-7" title="">[8]</a></sup> A state memorial service was held on 8 April. He was survived by Sonia, who passed in 2010, and their children. His younger brother,<a href="/wiki/McMahon-2364" title="McMahon-2364">Samuel</a>, had predeceased him in 1985. </p><p>A portrait by (Sir) Ivor Hele (1973) hangs in Parliament House, Canberra, and one by Charles Thompson (1985) is in the dining hall of St Paul’s College, University of Sydney. </p> <a name="Sources"></a><h2> <span class="mw-headline"> Sources </span></h2> <ol class="references"><li id="_note-0"><a href="#_ref-0" title="">↑</a> <a href="https://familyhistory.bdm.nsw.gov.au/lifelink/familyhistory/search" class="external text" title="https://familyhistory.bdm.nsw.gov.au/lifelink/familyhistory/search" rel="nofollow">New South Wales Birth Index #7911/1908; registered at Redfern to parents William D and Mary E A</a> </li> <li id="_note-1"><a href="#_ref-1" title="">↑</a> <a href="https://recordsearch.naa.gov.au/SearchNRetrieve/Interface/ViewImage.aspx?B=5657461" class="external text" title="https://recordsearch.naa.gov.au/SearchNRetrieve/Interface/ViewImage.aspx?B=5657461" rel="nofollow">National Archives of Australia, WWII Service Record: McMahon, William : Service Number - NX100034 : Date of birth - 23 Feb 1908 : Place of birth - Sydney NSW : Place of enlistment - Sydney NSW : Next of Kin - McMahon, Samuel</a></li> <li id="_note-2"><a href="#_ref-2" title="">↑</a> <a href="https://nominal-rolls.dva.gov.au/veteran?id=208257&c=WW2" class="external text" title="https://nominal-rolls.dva.gov.au/veteran?id=208257&c=WW2" rel="nofollow">Department of Veterans' Affairs nominal roll: NX100034 (N79722) Major William McMahon; accessed 18 Aug 2024</a></li> <li id="_note-3"><a href="#_ref-3" title="">↑</a> <a href="https://familyhistory.bdm.nsw.gov.au/lifelink/familyhistory/search" class="external text" title="https://familyhistory.bdm.nsw.gov.au/lifelink/familyhistory/search" rel="nofollow">New South Wales Marriage Index #10939/1965 at Sydney to Sonia Rachel Hopkins</a></li> <li id="_note-4"><a href="#_ref-4" title="">↑</a> <a href="https://honours.pmc.gov.au/honours/awards/1065991" class="external text" title="https://honours.pmc.gov.au/honours/awards/1065991" rel="nofollow">Australian Honours: CH; accessed 18 Aug 2024</a></li> <li id="_note-5"><a href="#_ref-5" title="">↑</a> <a href="https://honours.pmc.gov.au/honours/awards/1073780" class="external text" title="https://honours.pmc.gov.au/honours/awards/1073780" rel="nofollow">Australian Honours: GCMG; accessed 18 Aug 2024</a></li> <li id="_note-6"><a href="#_ref-6" title="">↑</a> <a href="https://familyhistory.bdm.nsw.gov.au/lifelink/familyhistory/search" class="external text" title="https://familyhistory.bdm.nsw.gov.au/lifelink/familyhistory/search" rel="nofollow">New South Wales Death Index #9077/1988; registered at Sydney</a></li> <li id="_note-7"><a href="#_ref-7" title="">↑</a> <a href="https://www.findagrave.com/memorial/131664865/william-mcmahon" class="external text" title="https://www.findagrave.com/memorial/131664865/william-mcmahon" rel="nofollow">: accessed 12 February 2022), memorial page for Sir William “Billy” McMahon (23 Feb 1908–31 Mar 1988), Find a Grave Memorial ID 131664865, ; Maintained by Arabelle (contributor 48258804) Cremated, Ashes given to family or friend</a></li></ol> <p>See also: </p> <ul><li><a href="https://www.nma.gov.au/explore/features/prime-ministers/billy-mcmahon" class="external text" title="https://www.nma.gov.au/explore/features/prime-ministers/billy-mcmahon" rel="nofollow">National Museum of Australia - William McMahon</a> </li><li><a href="https://primeministers.moadoph.gov.au/prime-ministers/billy-mcmahon" class="external text" title="https://primeministers.moadoph.gov.au/prime-ministers/billy-mcmahon" rel="nofollow">Museum of Australian Democracy (Old Parliament House) - Billy McMahon</a> </li><li><a href="http://adb.anu.edu.au/biography/mcmahon-sir-william-billy-15043" class="external text" title="http://adb.anu.edu.au/biography/mcmahon-sir-william-billy-15043" rel="nofollow">Australian Dictionary of Biography - Sir William (Billy) McMahon</a> </li><li><a href="http://en.wikipedia.org/wiki/William_McMahon" class="external text" title="http://en.wikipedia.org/wiki/William_McMahon" rel="nofollow">Wikipedia entry on Sir William McMahon</a> </li><li><a href="https://www.wikitree.com/wiki/Space:Australian_Knights_and_Dames" class="external text" title="https://www.wikitree.com/wiki/Space:Australian_Knights_and_Dames" rel="nofollow">WikiTree: Australian Knights and Dames; accessed 18 Aug 2024</a>. </li></ul>  <br/><br/> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-5983849578006601" crossorigin="anonymous"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-5983849578006601" data-ad-slot="1783638731" data-ad-format="auto" data-full-width-responsive="true"> </ins> <script>(adsbygoogle=window.adsbygoogle||[]).push({});</script> <br/><br/> </div> <div class="six columns"> <div class="wtad-ancestry-profile" style="margin-left: auto; margin-right: auto;"> <span class="small">Sponsored Search by Ancestry.com</span> <form> <div style="padding:3px; clear:both;"> <input class="small" id="GivenName_300x250_v2" type="text" value="William" placeholder="First Name"> </div> <div style="padding:3px;"> <input class="small" id="Surname_300x250_v2" type="text" value="McMahon" placeholder="Last Name"> </div> <div style="padding:3px;"> <a href="https://click.linksynergy.com/deeplink?id=Xib7NfnK11s&mid=50138&murl=" class="button small ad-ancestrySearch" style="padding:5px;" id="button_300x250_v2" onclick="myFunction(); 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Have you taken a test? If so, <a href="/index.php?title=Special:Userlogin" title="Login or register for free">login</a> to add it. If not, <a href="https://click.linksynergy.com/deeplink?id=Xib7NfnK11s&mid=50138&murl=https%3A%2F%2Fwww.ancestry.com%2Fdna" title="Discover the family story your DNA can tell with Ancestry DNA" rel="nofollow" target="_blank">see our friends at Ancestry DNA</a>. </div> <a name="photos"></a> <div class="row"> <span class="large"><strong>Images: 2</strong></span> <div style="width:300px; margin-top:5px; margin-bottom:20px; margin-left:auto; margin-right:auto;"> <a href="/photo/jpg/McMahon-898"><span class="large">William McMahon: 20th Prime Minister of Australia</span><br/><img src="/photo.php/thumb/9/9b/McMahon-898.jpg/300px-McMahon-898.jpg" width="300" height="410" alt="William McMahon: 20th Prime Minister of Australia" border="0"></a> <br/> </div> <div style="width:300px; margin-top:5px; margin-bottom:20px; margin-left:auto; margin-right:auto;"> <a href="/photo/jpg/McMahon-2368"><span class="large">Former Prime Minister Sir William McMahon, wife Sonia and children Julian (11), Debbie (6) and Melinda (12)</span><br/><img src="/photo.php/thumb/7/79/McMahon-2368.jpg/300px-McMahon-2368.jpg" width="300" height="225" alt="Former Prime Minister Sir William McMahon, wife Sonia and children Julian (11), Debbie (6) and Melinda (12)" border="0"></a> <br/> </div> </div> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-5983849578006601" crossorigin="anonymous"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-5983849578006601" data-ad-slot="1260301656" data-ad-format="auto" data-full-width-responsive="true"></ins> <script>(adsbygoogle=window.adsbygoogle||[]).push({});</script> <br><br> </div>  <div id="comments" class="sixteen columns row" data-title="McMahon-898" data-person-mnamedb="McMahon-898" data-show-archived="0"> <a name="WT-comments"></a> <span class="large"><strong>Comments</strong></span> <div class="comment-present comment-hide"> <span class="commentContainerToggle comment"> <button class="button small comment-action" data-action="hideComments" data-page-id="7888222" title="Hide comments">[hide]</button> <button class="button small comment-action" data-action="showComments" data-page-id="7888222" title="Show comments">[show]</button> </span><br/> </div> <div> Leave a message for others who see this profile. </div> <div class="comment-absent"> There are no comments yet. </div> <div id="commentContainer"> <div class="box gray rounded row"> <a href="/index.php?title=Special:Userlogin" title="Login or register">Login</a> to post a comment. </div> </div> </div> <script src="/skins/wikitree/comment.js.pagespeed.jm.tfE5YW9pu6.js"></script>  <div class="sixteen columns"> <br/>Rejected matches › <a href="/wiki/McMahon-2466" target="_blank">William H. McMahon (1906-)</a> › <a href="/wiki/McMahon-5126" target="_blank">William A McMahon (1910-1998)</a> </div> <div class="sixteen columns"> <p> This week's connection theme is <a href="https://www.wikitree.com/g2g/1821086/play-this-weeks-thanksgiving-connection-checkers-game" title="Here is this week's Thanksgiving Connection Checkers game">Thanksgiving</a>. William is 21 degrees from William Bradford, 23 degrees from Peter Burnett, 23 degrees from Lydia Child, 32 degrees from Juan de Oñate y Salazar, 23 degrees from Martin Frobisher, 23 degrees from Sarah Hale, 31 degrees from Massasoit Wampanoag, 23 degrees from Ronald Reagan, 22 degrees from Franklin Roosevelt, 24 degrees from Isidor Straus, 21 degrees from Susanna Winslow and 23 degrees from John Woodlief on our <a href="/wiki/Help:Collaborative_Family_Tree" title="Here is more about the single family tree concept and how it works">single family tree</a>. <a href="/index.php?title=Special:Userlogin" title="Login or register for free">Login</a> to see how you relate to 33 million family members. </p></div>  </div> <div class="container"> <div class="sixteen columns"> <p align="center"><a href="/indexes/person/M/">M</a>  >  <a href="/genealogy/MCMAHON">McMahon</a>  >  William McMahon GCMG CH PC</p> <p>Categories: <span dir='ltr'><a href="/wiki/Category:Australia%2C_Project_Managed_Profiles" title="Category:Australia, Project Managed Profiles">Australia, Project Managed Profiles</a></span> | <span dir='ltr'><a href="/wiki/Category:Australia%2C_Profile_Improvement_-_Notables" title="Category:Australia, Profile Improvement - Notables">Australia, Profile Improvement - Notables</a></span> | <span dir='ltr'><a href="/wiki/Category:Abbottsholme_College%2C_Killara%2C_New_South_Wales" title="Category:Abbottsholme College, Killara, New South Wales">Abbottsholme College, Killara, New South Wales</a></span> | <span dir='ltr'><a href="/wiki/Category:Sydney_Grammar_School%2C_Darlinghurst%2C_New_South_Wales" title="Category:Sydney Grammar School, Darlinghurst, New South Wales">Sydney Grammar School, Darlinghurst, New South Wales</a></span> | <span dir='ltr'><a href="/wiki/Category:University_of_Sydney%2C_Camperdown%2C_New_South_Wales" title="Category:University of Sydney, Camperdown, New South Wales">University of Sydney, Camperdown, New South Wales</a></span> | <span dir='ltr'><a href="/wiki/Category:Australia%2C_Solicitors" title="Category:Australia, Solicitors">Australia, Solicitors</a></span> | <span dir='ltr'><a href="/wiki/Category:Headquarters_2nd_Australian_Corps%2C_Australian_Army%2C_World_War_II" title="Category:Headquarters 2nd Australian Corps, Australian Army, World War II">Headquarters 2nd Australian Corps, Australian Army, World War II</a></span> | <span dir='ltr'><a href="/wiki/Category:Liberal_Party_of_Australia" title="Category:Liberal Party of Australia">Liberal Party of Australia</a></span> | <span dir='ltr'><a href="/wiki/Category:New_South_Wales%2C_Members_of_the_House_of_Representatives" title="Category:New South Wales, Members of the House of Representatives">New South Wales, Members of the House of Representatives</a></span> | <span dir='ltr'><a href="/wiki/Category:St_Mark%27s_Anglican_Church%2C_Darling_Point%2C_New_South_Wales" title="Category:St Mark's Anglican Church, Darling Point, New South Wales">St Mark's Anglican Church, Darling Point, New South Wales</a></span> | <span dir='ltr'><a href="/wiki/Category:Australia%2C_Prime_Ministers" title="Category:Australia, Prime Ministers">Australia, Prime Ministers</a></span> | <span dir='ltr'><a href="/wiki/Category:Australia%2C_Federal_Treasurers" title="Category:Australia, Federal Treasurers">Australia, Federal Treasurers</a></span> | <span dir='ltr'><a href="/wiki/Category:Order_of_the_Companions_of_Honour" title="Category:Order of the Companions of Honour">Order of the Companions of Honour</a></span> | <span dir='ltr'><a href="/wiki/Category:Knights_Grand_Cross_of_the_Order_of_St_Michael_and_St_George" title="Category:Knights Grand Cross of the Order of St Michael and St George">Knights Grand Cross of the Order of St Michael and St George</a></span> | <span dir='ltr'><a href="/wiki/Category:Cremated%2C_Ashes_With_Loved_Ones" title="Category:Cremated, Ashes With Loved Ones">Cremated, Ashes With Loved Ones</a></span> | <span dir='ltr'><a href="/wiki/Category:Australia%2C_Notables_in_Government" title="Category:Australia, Notables in Government">Australia, Notables in Government</a></span> | <span dir='ltr'><a href="/wiki/Category:Notables" title="Category:Notables">Notables</a></span></p> </div> </div> <div id="footer"> <div class="container"> <div class="sixteen columns"> <p><a href="/" title="Go to the WikiTree Home Page">WIKITREE HOME</a>   |   <a href="/wiki/Help:About_WikiTree" title="About WikiTree, the Community, and our Mission">ABOUT</a>   |   <a href="/g2g/" title="Genealogist-to-Genealogist Community Forum">G2G FORUM</a>   |   <a href="/wiki/Help:How_to_Use_WikiTree" title="Help: How to use WikiTree">HELP</a>   |   <a href="/wiki/Special:SearchPerson" title="Search for a Person">SEARCH</a></p> <p>IMPORTANT PRIVACY NOTICE & DISCLAIMER: YOU HAVE A RESPONSIBILITY TO USE CAUTION WHEN DISTRIBUTING PRIVATE INFORMATION. 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