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

Alphonse was born on June 1st, 1226.  Alphonse's father was Jean de Brienne and his mother was Princess of Castile and Läeon Berenguela.  His paternal grandparents were Erard II De Brienne and Agnes de Montfaucon; his maternal grandparents were Alfonso IX Fernandez and Queen of Castile Berenguela. He had two brothers named Jean II and Louis.  He was the second oldest of the three children. He had a half-sister named Yolande.

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