Guillaume IX

Duke of Aquitaine and Gascony and Count of Poitou (1071–1127)

Parents

• Hildegarde of Burgundy
• William VIII, Duke of Aquitaine

Children

• Guillaume X
• Raymond of Poitiers
• Henry of Poitiers
• Agnes of Aquitaine, Queen of Aragon

Siblings

• Beatrix of Poitiers
• Agnes of Aquitaine, Queen of León and Castile
• Agnes of Aquitaine, Queen of Aragon and Navarre

Partners

• Dangereuse de L'Isle Bouchard
• Philippa, Countess of Toulouse
• Ermengarde of Anjou