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.
George Mountbatten, 4th Marquess of Milford Haven George Ivar Louis Mountbatten, 4th Marquess of Milford Haven (born 6 June 1961), styled Earl of Medina before 1970, is a British businessman, peer, and current Head of the House of Mountbatten.