Isabella de Fortibus, Countess of Devon

Parents

• Baldwin de Redvers, 6th Earl of Devon
• Amice de Clare

Children

• Thomas de Forz, Count of Aumale
• Avice de Forz
• John de Forz
• William de Forz
• Aveline de Forz

Siblings

• Baldwin de Redvers, 7th Earl of Devon

Partners

• William III de Forz, 4th Earl of Albemarle