Nielsen Hayden genealogy
Family: William fitz Robert / Hawise of Leicester (F5507)
m. Abt 1150-
Father | Male
William fitz Robert
Born Died 23 Nov 1183 Buried Kernsham Abbey, Somerset, England 
Married Abt 1150 [1, 2, 3] Father Robert of Gloucester | F2180 Group Sheet Mother Mabel fitz Robert | F2180 Group Sheet
Mother | Female
Hawise of Leicester
Born Died 24 Apr 1197 Buried Father Robert of Meulan | F4526 Group Sheet Mother Amice de Gael | F4526 Group Sheet
Child 1 | Female
Isabel
Born Died 14 Oct 1217 Buried Spouse John, King of England | F121 Married 29 Aug 1189 Marlborough, Wiltshire, England 
Spouse Hubert de Burgh | F2042 Married Sep 1217
Child 2 | Female
+ Amice of Gloucester
Born Died 1 Jan 1225 Buried Spouse Richard de Clare | F489 Married Abt 1180
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Sources - [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [S145] Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis and Walter Lee Sheppard, Jr. 8th edition, William R. Beall & Kaleen E. Beall, eds. Baltimore: Genealogical Publishing Company, 2004, 2006, 2008.
- [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.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.