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Male William IX of Aquitaine Click to view William IX of Aquitaine in the family tree

William IX was born on October 22nd, 1071.1   William IX's father was William VIII of Aquitaine and his mother was Hildegard of Burgundy.  His paternal grandparents were William III\V of Aquitaine and Agnes de Macon; his maternal grandparents were Robert the Old and Ermengarde d'Anjou.  He was an only child.1 

Family Details of William IX's family with Philippa of Toulouse

1 charlemegne.FTW

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