| William VIII of Aquitaine, duke of Gascony (1052–1086), and then duke of Aquitaine and count of Poitiers (as William VI) between 1058 and 1086 | |
| B: | 1025 |
| D: | 25 Sep 1086 |
| William the Great (V) of Aquitaine |
| William the Great (V) of Aquitaine | |
| B: | 969 |
| D: | 31 Jan 1030 |
| Agnes of Burgundy, Duchess of Aquitaine | |
| M: | 1019 |
| D: | 10 Nov 1068 |
|
| William IV of Aquitaine, Duke of Aquitaine, Count of Poitou from 963 to his retirement in 990 |
| William IV of Aquitaine, Duke of Aquitaine, Count of Poitou from 963 to his retirement in 990 | |
| B: | 937 |
| D: | 3 Feb 994 |