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William VIII
duke of Gascony (1052–1086), then duke of Aquitaine and count of Poitiers
Years: 1025 - 1086
William VIII (c. 1025 – 25 September 1086), born Guy-Geoffrey (Gui-Geoffroi), is duke of Gascony (1052–1086), then duke of Aquitaine and count of Poitiers (as William VI) between 1058 and 1086, succeeding his brother William VII (Pierre-Guillaume).
