Isabelle was the daughter of unknown parents. The date and place of her birth have not been found.
She had three marriages/partners. Her first husband was Jean Plantagenêt, who she married on 29 AUG 1189. The place has not been found. They had no known children.
Her second husband was Geoffroy de Mandeville. They were married, but the date and place have not been found. They had no known children.
Her third husband was Hubert de Burgh, who she married in ABT 1217. The place has not been found. They had no known children.