Margaret de Quincy, Countess of Derby

Parents

• Helen of Galloway
• Roger de Quincy, 2nd Earl of Winchester

Children

• Robert de Ferrers, 6th Earl of Derby
• Elizabeth Ferrers
• Joan de Ferrers
• William Ferrers

Siblings

• Helen de Quincy
• Elizabeth de Quincy

Partners

• William de Ferrers, 5th Earl of Derby