Events
Date of Birth: about 1074.
Place of Birth: unknown.
The date is given by Schmid.
Date of Death: 13 December 1126.
Place of Death: Ravensburg.
The date and place are given by Reindel and by Schmid.
Place of Burial: Weingarten.
The place is given by Reindel and by Schmid.
Relationships
Father: Welf I, duke of Bavaria.
This relationship is given by Reindel, by Schmid, and by Schneidmüller (p. 12).
Mother: Judith of Flanders.
This relationship is given by Reindel, by Schmid, and by Schneidmüller (p. 12).
Spouse: Wulfhilde of Saxony.
This relationship is given by Reindel, by Weller, by Schmid, and by Schneidmüller (pp. 12, 30).
Children (by Wulfhilde):
(Complete source citations for facts about the children on this page are currently outside of the scope of this project.)
Henry X “the Proud” (about 1108 - 20 October 1139), duke of Bavaria, duke of Saxony, married Gertrude of Süpplingenburg.
Conrad (died 17 March 1126).
Sophia married (1) Berthold III, duke of Zähringen; married (2) Leopold “the Strong”, margrave of Styria.
Judith married Frederick II “the One-Eyed”, duke of Swabia.
Matilda married (1) Diepold (IV), margrave of Vohburg; married (2) Gebhard (III), count of Sulzbach.
Welf (16 December, 1114 or 1115 - 14 or 15 December 1191), duke of Spoleto, margrave of Tuscany, married Uta of Calw, duchess of Schauenburg.
Wulfhilde married Rudolf, count of Bregenz.
Children (illegitimate):
Adalbert (died 1144), abbot of Corvey.
References
Reindel, Kurt. “Heinrich IX. der Schwarze” in Neue Deutsche Biographie 8 (1969) S. 343 [Onlinefassung].
Schmid, A. "Heinrich IX der Schwarze" in volume 4 of Lexikon des Mittelalters. Munich: LexMA-Verlag, 1980-1998.
Schneidmüller, Bernd. Die Welfen: Herrschaft und Erinnerung (819-1252) (Kohlhammer: Stuttgart, 2000).
Weller, Tobias. Die Heiratspolitik des deutschen Hochadels im 12. Jahrhundert. (2004: Böhlau Verlag).