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Male William I de Belleme, Seigneur de Sannois Click to view William I de Belleme, Seigneur de Sannois in the family tree

William I de Belleme, Seigneur de Sannois was born about 0966 in Belleme,Perche,France.1   William I de Belleme, Seigneur de Sannois' father was William de Belleme, Seigneur de Saonnois and his mother was Mathilde, Dame de Conde-Sur-Noirau.  His paternal grandparents were Yves II De Creil et Belleme and Gohilde de Pontieu.  He was an only child.  He died in 1028.1 


William I de Belleme, Seigneur de Sannois' family with Mathilda de Ganelon

‌William I de Belleme, Seigneur de Sannois and Mathilda were married in a religious ceremony about 0991.1   They had two sons named Warin , Siegneur de Domfront and William II.

1 {passmore4.ged}
Further sources/citations:
Ancestry.com 18259.GED, {GEDCOM File : 1352117.ged}

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