Nielsen Hayden genealogy
Family: William I "The Lion", King of Scotland / Ermengarde de Beaumont (F6038)
m. 5 Sep 1186-
Male
William I "The Lion", King of Scotland
Birth 1143 Death 4 Dec 1214 Stirling, Stirlingshire, Scotland 
Burial Arbroath Abbey, Angus, Scotland Marriage 5 Sep 1186 [1, 2] Other Spouse (Unknown mistress of William the Lion, King of Scotland) | F5401 Marriage Other Spouse (Unknown) de Avenal | F4738 Marriage Father Henry of Scotland | F1025 Group Sheet Mother Ada de Warenne | F1025 Group Sheet
Female
Ermengarde de Beaumont
Birth Death 11 Feb 1233 Burial Balmerino Abbey, Fife, Scotland Father Richard I de Beaumont | F641 Group Sheet Mother Lucy de l'Aigle | F641 Group Sheet
Female
+ Margaret of Scotland
Birth Between 1187 and 1195 Death Bef 25 Nov 1259 Burial Black Friars, Holborn, London, England Spouse Hubert de Burgh | F749 Marriage Jun 1221 York, Yorkshire, England
Male
+ Alexander II, King of Scotland
Birth 24 Aug 1198 Haddington, East Lothian, Scotland Death 8 Jul 1249 Kerrera, Argyll, Scotland Burial Melrose Abbey, Roxburghshire, Scotland Spouse (Unknown mistress of Alexander II) | F12025 Marriage Spouse Joan of England | F12027 Marriage 19 Jun 1221 York, Yorkshire, England
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Sources - [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998.
- [S76] The Oxford Dictionary of National Biography. Oxford University Press, 2004-ongoing.
- [S128] The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant ed. Vicary Gibbs, H. A. Doubleday, Duncan Warrand, Howard de Walden, Geoffrey H. White and R. S. Lea. 2nd edition. 14 volumes (1-13, but volume 12 spanned two books), London, The St. Catherine Press, 1910-1959. Volume 14, "Addenda & Corrigenda," ed. Peter W. Hammond, Gloucestershire, Sutton Publishing, 1998.