Question: A direct ancestor of the wife of Prince William was the first member of the Fairfax family to own which castle?
Sentence (from "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.
Relevant evidence: Yes