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Male John I de Brienne Click to view John I de Brienne in the family tree

John I was born about 1195 in Acre, Palestine.  John I's father was Erard II de Brienne and his mother is Agnes de Montfaucon.  His paternal grandparents were Gauthier II de Brienne and Adele de Rameru; his maternal grandparents were Richard de Montfaucon and Agnes de Montbelliard.  He was an only child.  He died in Constantinople, Turkey.


John I's first family with Mary la Marquise of Jerusalem

‌John I and Mary la Marquise of were married in a religious ceremony before 1212.  They had a daughter named Isabel II of.


John I's second family with Berengaria Infanta of Castile & Leon

‌John I and Berengaria Infanta of Castile & were married in a religious ceremony in 1224 in Toledo.  They had three sons and a daughter, named Alfons d'Acre, Jean, Louis d'Acre and Marie.

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