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Male Duke Guillaume d'Alencon III Click to view Duke Guillaume d'Alencon III in the family tree

Guillaume was born about 1055 in Alencon, Orne, France.  Guillaume's father is Robert d'Alencon II and his mother was Agnes de Ponthieu.  His paternal grandparents were Earl Roger de Montgomery of Shrewsbury and Mabel de Talvas de Belleme; his maternal grandparents were Count Guy de Ponthieu I and Ada d'Amiens. He had a half-brother and a half-sister, named William Talvas Montgomery and Emeline.  He died in 1172.


Guillaume's family with Countess Alice Helie of Burgundy

They had a son named Guy.

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