A direct ancestor of the wife of Prince William was the first member of the Fairfax family to own which castle?
Thomas Fairfax (Walton) Sir Thomas Fairfax (  1450 – 31 March 1505) was the first member of the Fairfax family to own Gilling Castle, near Gilling East, North Riding of Yorkshire, England. He is a direct ancestor of both Prince William, Duke of Cambridge and The Duchess of Cambridge.
Barnwell Manor Barnwell Manor is the historic former home of the Duke and Duchess of Gloucester. It is located close to the village of Barnwell, near Oundle, Northamptonshire, England.