Who was the legal grandson of the Earl of Merica?
Ealdgyth, daughter of Earl Ælfgar Ealdgyth ("fl. c". 1057–1066), also Aldgyth or in modern English, Edith, was a daughter of Ælfgar, Earl of Mercia, the wife of Gruffudd ap Llywelyn (d. 1063), ruler of all Wales, and later the wife and queen consort of Harold Godwineson, king of England in 1066. She was described by William of Jumièges as a considerable beauty.
Ralph Percy, 12th Duke of Northumberland Ralph George Algernon Percy, 12th Duke of Northumberland, {'1': ", '2': ", '3': ", '4': "} (born 16 November 1956), styled Lord Ralph Percy until 1995, is an English aristocrat, hereditary peer and largely rural landowner.