William IX was the Duke of Aquitaine and Gascony and Count of Poitou between 1086 and his death. He was also one of the leaders of the Crusade of 1101.
- Occupation
- troubadour, poet, writer, composer
- Citizenship
- France, Duchy of Aquitaine
- Born
- October 22, 1071
- Died
- February 10, 1126
