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William V of Aquitaine (969-January 30 1030), nicknamed the Great, was Duke of Aquitaine and Count of Poitiers. William was the son of William IV of Aquitaine by his wife Emma of Blois. He married three times and four of his five sons ruled Aquitaine after his death.
See also: Dukes of Aquitaine family tree
| Preceded by: William IV | Duke of Aquitaine | Succeeded by: William VI |
| Count of Poitiers |