Poss. HM George I's 18-Great Grandfather. Poss. HRE Charles VI's 18-Great Grandfather. Poss. U.S. President [WASHINGTON]'s 22-Great Grandfather. HRH Charles's 27-Great Grandfather. HRH Albert II's 28-Great Grandfather. Louis XVII's 23-Great Grandfather. Poss. Jamie's 29-Great Grandfather.