Poss. HM George I's 18-Great Grandfather. Poss. HRE Charles VI's 19-Great Grandfather. Poss. U.S. President [WASHINGTON]'s 22-Great Grandfather. Poss. PM Churchill's 26-Great Grandfather. Poss. Lady Diana's 25-Great Grandfather. Poss. HRH Albert II's 25-Great Grandfather. Poss. Jamie's 29-Great Grandfather.