William II of Aquitaine (d. 926), nicknamed the Young was Count of Auvergne and Duke of Aquitaine from 918 to his death, succeeding his uncle William I of Aquitaine. William was son of the count Alfred I of Carcassone and Adelinde of Auvergne, William I's sister. Marriages and descendents are unknown and he was succeeded by his younger brother.
- See also
- Dukes of Aquitaine family tree
