William IX, Duke of Aquitaine

William IX
Miniature of William from a 13th-century chansonnier now in the Bibliothèque nationale de France
Duke of Aquitaine
Reign	1086–1127
Predecessor	William VIII
Successor	William X
Born	22 October 1071
Died	10 February 1126 (aged 54)
Spouses	Ermengarde of Anjou Philippa, Countess of Toulouse
Issue	William X, Duke of Aquitaine Raymond, Prince of Antioch Agnes, Queen of Aragon
House	Ramnulfids
Father	William VIII, Duke of Aquitaine
Mother	Hildegarde of Burgundy

William IX (Occitan: Guilhèm de Peitieus or Guilhem de Poitou, French: Guillaume de Poitiers; 22 October 1071 – 10 February 1126), called the Troubadour, was the Duke of Aquitaine and Gascony and Count of Poitou (as William VII) between 1086 and his death. He was also one of the leaders of the Crusade of 1101. Though his political and military achievements have a certain historical importance, he is best known as the earliest troubadour—a vernacular lyric poet in the Occitan language—whose work survives.^[a]

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