Guillaume IX

1071–1126 · Poitiers-Aquitaine

Duke of Aquitaine and Gascony and Count of Poitou. Died at Poitiers.

See Guillaume IX on the tree On the map

Also held: duke of Aquitaine · count of Poitiers

Family

Father

William VIII, Duke of Aquitaine

Mother

Hildegarde of Burgundy

Married

Ermengarde of Anjou 1089
Philippa, Countess of Toulouse 1094

Children (3)

William X, Duke of Aquitaine 1099
Agnes of Aquitaine, Queen of Aragon 1103
Raymond of Poitiers 1115

Siblings (2)

Agnes of Aquitaine, Queen of León and Castile 1059
Agnes of Aquitaine, Queen of Aragon and Navarre 1072

Related to

• Guillaume IX was the 8× great-grandson of Charlemagne.
• Guillaume IX was the 18× great-grandfather of Victoria.
• Guillaume IX was the 15× great-grandfather of Louis XIV of France.