Nielsen Hayden genealogy
Family: Robert de Breteuil / Pernel de Grandmesnil (F3729)
m. 1155-
Father | Male
Robert de Breteuil
Born of Leicester, Leicestershire, England 
Died 1190 Buried Durazzo, Greece 
Married 1155 [1, 2] Father Robert of Meulan | F4526 Group Sheet Mother Amice de Gael | F4526 Group Sheet
Mother | Female
Pernel de Grandmesnil
Born Died 1 Apr 1212 Buried Father William de Grandmesnil | F5397 Group Sheet Mother
Child 1 | Female
+ Margaret of Leicester
Born Died 12 Jan 1235 Buried Spouse Saher de Quincy | F6071 Married Bef 1173
Child 2 | Female
+ Amicie de Beaumont
Born Died 3 Sep 1215 Buried Spouse Simon IV de Montfort | F14709 Married Bef Jan 1175
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Sources - [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., "before 1155-1159".
- [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.