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Male Alphonse de BRIENNE Click to view Alphonse de BRIENNE in the family tree

Alphonse's father was JEAN I EMPEROR de CONSTANTINOPLE and his mother was BERENGARIA de LEON.  His paternal grandparents were ERARD II COUNT de BRIENNE and AGNES de MONTFAUCON; his maternal grandparents were ALFONSO IX EMPEROR de SPAIN and BERENGARIA HEIRESS de CASTILE. He had two brothers and a sister, named JEAN, LOUIS "d'ACRE" and Yolante.

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