"According to Europäische Stammtafeln, she's Beatrix de Poitou (p. Guillame V "l...

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"According to Europäische Stammtafeln, she's Beatrix de Poitou (p. Guillame V "le grand" / Guillame III, Comte de Poitou and Agnes de Macon. ... But she's, "not named among the children of Duke Guillaume V by Richard. If she was the daughter of Guillaume, it seems surprising that she was married to a relatively obscure local nobleman, especially in light of the high profile marriage of her supposed sister Agnes with the King of Germany" (Cawley, 2006).[1]

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