Nielsen Hayden genealogy
Constance of England
- Aft 1175-
Name Constance of England [1] Gender Female Death Aft 1175 [2] 
Siblings4 siblings Person ID I1580 Ancestry of PNH, TNH, and others | Ancestor of AP, Ancestor of DDB, Ancestor of DGH, Ancestor of DK, Ancestor of JMF, Ancestor of JTS, Ancestor of LD, Ancestor of LDN, Ancestor of LMW, Ancestor of TNH, Ancestor of TSW, Ancestor of TWK, Ancestor of UKL, Ancestor of XYZ Last Modified 6 Jan 2018
Father Henry I, King of England, b. 1068 d. 1 Dec 1135, Lyon-la-Forêt, near Rouen, Seine-Maritime, Normandy, France 
(Age 67 years) Mother (Unknown mistress or mistresses of Henry I) Family ID F334 Group Sheet | Family Chart
Family Roscelin de Beaumont d. Aft 1145 Marriage Bef 1130 [2] Children + 1. Richard I de Beaumont, b. Between 1120 and 1130 d. Aft 1194 (Age ~ 75 years) Family ID F2494 Group Sheet | Family Chart Last Modified 28 Jun 2015
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Notes - Also called Maud. She was definitely a natural child of Henry I. According to some sources, her mother was Isabel de Beaumont, wife of Gilbert "Strongbow" Fitz Gilbert, Earl of Pembroke (also called Gilbert de Clare). This relationship is not confirmed in Royal Ancestry's extensive coverage of Henry I's many illegitimate offspring, although her marriage to Roscelin de Beaumont is noted.
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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.
- [S142] Royal Ancestry: A Study in Colonial and Medieval Families by Douglas Richardson. Salt Lake City, 2013.
- [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.