Results 2
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William 4014
Willelmus Aquitanie dux (Riley-Smith p. 225)
William 4014 William IX of Poitou, duke of Aquitaine L XI / E XII Willelmus Aquitanie dux (Riley-Smith p. 225)
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William 4021
Willelmus
William 4021 William X, count of Poitou L XI / E XII Willelmus