Margaret de Newburg, 7th Countess of Warwick

Parents

• Margery de Oilly
• Henry de Beaumont, 5th Earl of Warwick
• Philippa Basset

Children

Siblings

• Thomas de Beaumont, 6th Earl of Warwick
• Richard (II) Siward

Partners

• John Marshal, Earl of Warwick
• John du Plessis, 7th Earl of Warwick