Robert Bertie, Lord Willoughby

Parents

• Mary Wynn
• Robert Bertie, 1st Duke of Ancaster and Kesteven

Children

Siblings

• Peregrine Bertie, 2nd Duke of Ancaster and Kesteven
• unknown son Bertie
• Lord Montague Bertie
• Vere Bertie
• unknown daughter Bertie
• unknown son Bertie