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Female Margaret De Brienne Click to view Margaret De Brienne in the family tree

Margaret was born about 1229.  Margaret's father was Jean De Brienne and her mother was Berengaria of Castile and Leon.  Her paternal grandfather was Erard De Brienne and her paternal grandmother is Agnes De Montbelliar; her maternal grandparents were Alfonso IX of Castile and Leon and Berengaria Alfonsez Sanchez of Castile. She had three brothers and a sister, named Alphonse, Jean, Louis and Marie.  She was the second youngest of the five children. She had a half-sister named Isabel II.  She died about 1287.

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