Nielsen Hayden genealogy
Family: Henry IX of Bavaria / Wulfhilde of Saxony (F327)
m. Abt 1100-
Father | Male
Henry IX of Bavaria
Born 1074 Died 13 Dec 1126 Ravensburg, Upper Swabia, Germany 
Buried Married Abt 1100 [1, 2] Father Welf I of Bavaria | F684 Group Sheet Mother Judith of Flanders | F684 Group Sheet
Mother | Female
Wulfhilde of Saxony
Born Abt 1075 Died 29 Dec 1126 Weingarten Abbey, Ravensburg, Upper Swabia, Germany Buried Father Magnus of Saxony | F351 Group Sheet Mother Sophia of Hungary | F351 Group Sheet
Child 1 | Female
+ Matilda of Bavaria
Born Died 16 Feb 1183 Buried Spouse Gebhard III of Sulzbach | F14577 Married 1129
Child 2 | Female
+ Wulfhild von Bayern
Born Died Aft 8 May 1160 Buried Spouse Rudolf von Bregenz | F14954 Married
Child 3 | Male
+ Heinrich of Saxony
Born Abt 1100 Died 20 Oct 1139 Buried Spouse Gertrud von Süpplinburg | F14935 Married 29 May 1127
Child 4 | Female
+ Judith of Bavaria
Born 19 May 1100 Died Aft 22 Feb 1130 Buried Waldburg, Heiligen Forst, Alsace Spouse Frederick II von Hohenstaufen | F50 Married 1121
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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.
- [S1347] Frederick Barbarossa: The Prince and the Myth by John Freed. New Haven: Yale University Press, 2016., "before 1100".
- [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.