Guillaume IX Duke of Aquitaine and Gascony and Count of Poitou (1071–1126) Parents Hildegarde of Burgundy William VIII, Duke of Aquitaine Children Raymond of Poitiers Henry of Poitiers Agnes of Aquitaine, Queen of Aragon William X, Duke of Aquitaine 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
