Background
Shortly before Isabella"s birth, her mother was dealing with problems in Castile, involving her brother John I of Aragon.
Shortly before Isabella"s birth, her mother was dealing with problems in Castile, involving her brother John I of Aragon.
Eleanor was forced to return to Navarre for her daughter"s birth. Isabella was the sixth of eight children. Her two younger brothers died in childhood, leaving Isabella and her five older sisters.
Isabella"s maternal grandparents were Henry II of Castile and Juana Manuel of Castile.
Her paternal grandparents were Charles II of Navarre and Joan of France, herself daughter of John II of France and Bonne of Bohemia.
She was a member of the House of Évreux.