Nielsen Hayden genealogy
Family: Guy-Geoffrey of Poitou / Hildegarde of Burgundy (F3924)
m. 1069-
Father | Male
Guy-Geoffrey of Poitou
Born Abt 1024 Died 25 Sep 1086 Chizé, Deux-Sèvres, Poitou-Charentes, France 
Buried Married 1069 [1] Father William III of Poitou | F4763 Group Sheet Mother Agnes of Burgundy | F4763 Group Sheet
Mother | Female
Hildegarde of Burgundy
Born Abt 1050 Died Aft 1104 Buried Father Robert I | F4435 Group Sheet Mother Ermengarde of Anjou | F4435 Group Sheet
Child 1 | Male
+ William IX of Aquitaine
Born 22 Oct 1071 Died 10 Feb 1126 Buried Spouse Dangereuse | F5141 Married Spouse Philippa of Toulouse | F4013 Married 1094
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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.
- [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.