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

John I was born in 1168 in Acre, Palestine.  John I's father was Erard II De Brienne and his mother is Agnes De Montfaucon.  His paternal grandparents were Walter II Comte De Brienne and Humberline De Soissons; his maternal grandfather was Richard II De Montfaucon and his maternal grandmother is Agnes De Montebeliard.  He was an only child.  He died  due to As A Franciscan Friar in Constantinople, Turkey.


John I's first family with Mary De Montferrat

‌John I and Mary were married in a religious ceremony on September 15th, 1210 in Acre, Palestine.


John I's second family with Berengaria Princess Of Leon And Castile

‌John I and Berengaria were married in a religious ceremony in 1224 in Toledo, Spain.  They had a son named John.

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