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

Guillaume I was born about 1122 in Troyes, Aube, Champagne, France.  Guillaume I's father was Guy I De Troyes and his mother was Helvide De Baudement.  His paternal grandparents were Thibaut de Dampierre and Elisabeth de Montlhery; his maternal grandparents were Andre de Roucy and Adelaide De Braine. He had a brother and a sister, named Renard I and Helwide.  He was the oldest of the three children.  He died about 1161.


Guillaume I's family with Ermengarde Basilie de Mouchy

‌Guillaume I and Ermengarde Basilie were married in a religious ceremony about 1152 in Montlucon, Allier, France.  They had two sons and three daughters, named Milon, Guy II, Elisabeth, Odette and Helvide.

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