Sir William Mortimer

Parents

• Roger Mortimer, 1st Baron Mortimer
• Maud de Braose, Baroness Wigmore

Children

Siblings

• Margaret de Mortimer
• Edmund Mortimer, 2nd Baron Mortimer
• Isabella Mortimer, Countess of Arundel
• Roger Mortimer de Chirk
• Sir Geoffrey Mortimer
• Ralph Mortimer

Partners

• Hawyse de Musegross