Editing William the Lion (section)

== Marriage and issue ==
Due to the terms of the Treaty of Falaise, Henry II had the right to choose William's bride. In 1184, William attended Henry II's court to request a marriage to Henry's granddaughter Matilda of Saxony, daughter of [[Henry the Lion|Duke Henry the Lion]] of Saxony and [[Matilda of England, Duchess of Saxony|Matilda of England]]. The proposal was referred to the pope and was forbidden on the grounds of consanguinity.<ref name=":0" />

Henry instead chose [[Ermengarde de Beaumont]], a great-granddaughter of King [[Henry I of England]], although through an illegitimate line.<ref name=":2">{{Cite ODNB |last=Scott |first=W. W. |title=Ermengarde [Ermengarde de Beaumont] (d. 1233), queen of Scots, consort of William I |url=https://www.oxforddnb.com/display/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-49356 |access-date=2024-09-14 |date=2004 |language=en |doi=10.1093/ref:odnb/49356}}</ref> They married at [[Woodstock Palace]] on 5 September 1186. [[Edinburgh Castle]] was her [[dowry]] and Henry II paid for the four days of festivities. After the wedding she was escorted to Scotland by Scottish nobles and Jocelin, Bishop of Glasgow.<ref name=":2" />

The marriage was not very successful, and it was many years before they had an heir. William and Ermengarde's children were:
# [[Margaret of Scotland, Countess of Kent]] (1193–1259),<ref>{{Cite ODNB |last=Scott |first=W. W. |title=Margaret, countess of Kent (1187x95–1259), princess |url=https://www.oxforddnb.com/display/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-49377 |access-date=2024-09-14 |date=2004 |language=en |doi=10.1093/ref:odnb/49377}}</ref> married [[Hubert de Burgh, 1st Earl of Kent]];
# [[Isabella of Scotland, Countess of Norfolk]] (1195–1263), married [[Roger Bigod, 4th Earl of Norfolk]];
# [[Alexander II of Scotland]] (1198–1249);<ref name=":1">{{Cite ODNB |last=Stringer |first=Keith |title=Alexander II (1198–1249), king of Scots |url=https://www.oxforddnb.com/display/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-322 |access-date=2024-09-14 |date=2004 |language=en |doi=10.1093/ref:odnb/322}}</ref>
# Marjorie (1200–17 November 1244),<ref>Duncan, Archibald Alexander McBeth. (1975) ''Scotland: The Making of the Kingdom.'' Oliver & Boyd''.'' p. 527. ISBN 9780050020371.</ref> married [[Gilbert Marshal, 4th Earl of Pembroke]].

Out of wedlock, William I had numerous illegitimate children, their descendants being among those who would [[Competitors for the Crown of Scotland|lay claim to the Scottish crown]].

By a daughter, name unknown, of Adam de Hythus:
# Margaret, married [[Eustace de Vesci]], [[Alnwick Castle|Lord of Alnwick]].<ref>{{cite web |last1=Saul |first1=Nigel |title=Eustace de Vesci |url=http://magnacarta800th.com/schools/biographies/the-25-barons-of-magna-carta/eustace-de-vesci/ |website=Magna Carta Trust |date=13 May 2013 |access-date=8 August 2016}}</ref>

By Isabel d'Avenel:
# Robert de London;<ref>Duncan,  Archibald Alexander McBeth. (1975) ''Scotland: The Making of the Kingdom.'' Oliver & Boyd''.'' p. 175. ISBN 9780050020371.</ref>
# Henry de Galightly, father of [[Patrick Galithly]] one of the competitors to the crown in 1291;<ref name="Balfour Paul, Vol. I, p. 5">"The Scots Peerage" (1904), Balfour Paul, Vol. I, p. 5</ref>
# Ada Fitzwilliam (c. 1164–1200), married [[Patrick I, Earl of Dunbar]] (c. 1152–1232);<ref name="Balfour Paul, Vol. I, p. 5"/> Ada predeceased her husband in 1200.<ref>{{Cite ODNB |last=McDonald |first=Andrew |title=Patrick, fourth earl of Dunbar (d. 1232), magnate |url=https://www.oxforddnb.com/display/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-50326 |access-date=2024-09-14 |date=2004 |language=en |doi=10.1093/ref:odnb/50326}}</ref>
# Aufrica married William de Say, whose great-great-grandson [[Roger de Mandeville]] was one of the competitors to the crown in 1291;<ref name="Balfour Paul, Vol. I, p. 5"/>
# [[Isabella Mac William]] (born c. 1165) married [[Robert III de Brus]] (1183) then [[Robert de Ros (died 1227)|Robert de Ros]] (1191), [[Magna Carta]] suretor.<ref>{{cite web |last1=Saul |first1=Nigel |title=Robert de Ros |url=http://magnacarta800th.com/schools/biographies/the-25-barons-of-magna-carta/robert-de-ros/ |website=Magna Carta Trust |date=24 June 2013 |access-date=8 August 2016}}</ref>