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Male William I De Dampierre Click to view William I De Dampierre in the family tree

William I De was born about 1125 in Troyes, Champagne, France.  William I De's father was Guy I De Dampierre and his mother was Helvide De Baudemont.  His paternal grandparents were Thibault De Dampierre and Elizabeth De Montlhery; his maternal grandparents were Andre De Montdidier and Adelaide De Braine. He had a sister named Agnes De.  He was the older of the two children.  He died after 1161.


William I De's family with Ermengarde De Mouchy

‌William I De and Ermengarde De were married in a religious ceremony about 1160 in France.  They had a son and a daughter, named Guy II Seigneur De and Helvide De.

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