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Male Jean I De Avesnes Click to view Jean I De Avesnes in the family tree

Jean I was born about 1241 in Of, Beaumont, Hainaut, Belgium.1   Jean I's father was Count of de Beaumont Avesnes Baudouin and his mother was Felicite De Coucy Vervins.  His paternal grandparents were Bouchard D'Avesnes and Margaret I of Flanders; his maternal grandparents were Thomas II De Coucy and Mahaut (Mathilde) De Rethel. He had a sister named Beatrice.  He was the older of the two children.1 

1 Joanne's Tree.1 GED.GED
Further source/citation:
daveanthes.FTW

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