Margaret Willoughby, Lady Willoughby

English noblewoman, daughter of Lord Deincourt (died in or before 1333)

Parents

• Sir Edmund Deincourt, 1st Lord Deincourt

Children

• Joan Willoughby
• John Willoughby, 2nd Lord Willoughby

Siblings

• Isabel Deincourt
• John Deincourt

Partners

• Robert de Willoughby, 1st Baron Willoughby de Eresby