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Male Count of Hainault Jean de Avesnes of Flanders I (John I D'Avesnes) Click to view Count of Hainault Jean de Avesnes of Flanders I in the family tree

Jean was born on May 1st, 1218 in Etraeunt, Nord, France.1   Jean's father was Bouchard d'Avesnes and his mother was Countess of Flanders & Hainault Margaret of Flanders.  His paternal grandparents were Jacques d'Avesnes and Adele de Guise; his maternal grandparents were Count Baldwin of Hainault VI and Marie de Champagne. He had three half-brothers and two half-sisters, named Guillaume, Guy, Jean, Jeanne and Marie.  He died at the age of 39 on December 24th, 1257 in Valenciennes, Nord, France.1 

Family Details of Jean's family with Countess Aleidis of Hainault

1 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I4243&style=TABLE
Further sources/citations:
http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I4243&style=TABLE, The Royal Descents of 500 Immigrants, World Family Tree Volume 2

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