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Male Guillaume de Dampierre Click to view Guillaume de Dampierre in the family tree

Guillaume was born in 1224 in Dampierre, Jura, France.1   Guillaume's father was Seigneur Guillaume de Dampierre II and his mother was Countess of Flanders & Hainault Margaret of Flanders.  His paternal grandparents were Guy de Dampierre II and Mahaut de Bourbon; his maternal grandparents were Count Baldwin of Hainault VI and Marie de Champagne. He had two brothers and two sisters, named Guy, Jean, Jeanne and Marie.  He was the oldest of the five children. He had a half-brother named Jean.

1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=bevangenealogy&id=I33360

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