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Source: William IX, Duke of Aquitaine (1071-1127), Wikipedia

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Titre William IX, Duke of Aquitaine (1071-1127), Wikipedia

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WILLIAM IX Duke of Aquataine

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William IX (Occitan: Guilhèm de Peitieus; Guilhem de Poitou French: Guillaume de Poitiers) (22 October 1071 – 10 February 1127), 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. William was the son of William VIII of Aquitaine by his third wife, Hildegarde of Burgundy. He was first married in 1088, at age sixteen, to Ermengarde, daughter of Fulk IV of Anjou. William was excommunicated for "abducting" the Viscountess Dangereuse (Dangerosa), the wife of his vassal Aimery I de Rochefoucauld, Viscount of Châtellerault. Between 1120 and 1123 William joined forces with the Kingdoms of Castile and León. He died on 10 February 1127, aged 56, after suffering a short illness.
Duke of Aquitaine
Count of Poitiers
1088–1127