Nielsen Hayden genealogy
Family: Otto I "The Illustrious" / Hadwig von Babenberg (F2095)
m. Between 869 and 870-
Father | Male
Otto I "The Illustrious"
Born Between 830 and 840 Died 30 Nov 912 Buried Gandersheim Abbey, Gandersheim, Lower Saxony, Germany 
Married Between 869 and 870 [1] Father Liudolf | F4889 Group Sheet Mother Oda Billung | F4889 Group Sheet
Mother | Female
Hadwig von Babenberg
Born Died 24 Dec 903 Buried Father Heinrich of Babenberg | F2696 Group Sheet Mother
Child 1 | Male
+ Heinrich I "The Fowler", King of Germany
Born Abt 876 Died 2 Jul 936 Membleben, Lower Saxony, Germany Buried Quedlinburg Abbey, Quedlinburg, Saxony-Anhalt, Germany Spouse St. Matilda | F3555 Married 909
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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.