baron du Bec-Crespin et de Dancy, seigneur d'Etrepagny, Grand chambellan de Normandie
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The De nobili genere Crispinorum records that "nepos de filio Willelmo, tertius Willelmus Crispinus" was "sanguinis propinquitate…comiti Andegavorum" and that he fought for them, was captured, died following his release when preparing a journey to Jerusalem, and was buried at Bec. Robinson identifies that battle in which Guillaume [III] was captured as the one fought by Geoffroy Plantagenet Comte d’Anjou against Robert de Sablé in 1135.
