I think Greystoke Castle is owned by the Howard Family. Lord Henry Howard-Molyneux-Howard owned it and he was the brother of the 12th Duke of Norfolk. He was also the grandfather of Sir Edward Stafford Howard KCB JP DL and Esme Howard 1st Baron Howard of Penrith GCB GCMG CVO.
Lord Henry’s son Henry Howard owned Greystoke Castle and Thornbury Castle. Henry Howard’s grandson via Sir Edward Stafford Howard KCB JP DL was Sir Algar Howard KCB KCVO MC TD.
Thornbury Castle is now a hotal owned by von Essen hotals
I don’t know which descendant of Lord Henry Howard-Molyneux-Howard owns Greystoke Castle. Replies would be great.