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Male Guillaume De Ponthieu Click to view Guillaume De Ponthieu in the family tree

Guillaume was born about 0900 in Montreuil, France.  Guillaume's father was Count of Montreuil and Amiens Rotgaire.  His paternal grandfather was II Herlouin.  He was an only child.  He died about 0965.


Guillaume's family with Mathilda De Ganelon

They had four sons named William, Hilduin, Ernicule and Warin de Montagne.

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