Poss. HM George I's 13-Great Grandfather. Poss. U.S. President [GARFIELD]'s 17-Great Grandfather. PM Churchill's 20-Great Grandfather. Lady Diana's 22-Great Grandfather. Poss. PM Cameron's 21-Great Grandfather. Louis XVII's 16-Great Grandfather. HM Juan Carlos' 21-Great Grandfather. Poss. `Osawatomie' Brown's 18-Great Grandfather. Poss. Jamie's 20-Great Grandfather.