George Keith was probably the last Earl Marishal at what ruined motte and bailey castle in Aberdeenshire, Scotland?
George Keith, 10th Earl Marischal: George Keith, 10th Earl Marischal (1692/3? George Keith, 10th Earl Marischal:  Jacobite by persuasion, he was the tenth and last Earl Marischal, having inherited the title from his father the 9th earl in 1712.
i don't know