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Male Jean de Brienne Click to view Jean de Brienne in the family tree

Jean was born after 1224.  Jean's father was John I de Brienne and his mother was Berengaria Infanta of Castile & Leon.  His paternal grandfather was Erard II de Brienne and his paternal grandmother is Agnes de Montfaucon; his maternal grandparents were Alfonso IX el Barboro of Castile and Leon and Berengaria Alfonsez de Castile. He had two brothers and a sister, named Alfons d'Acre, Louis d'Acre and Marie.  He is the second oldest of the four children. He had a half-sister named Isabel II of.

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