HM George I's 16-Great Grandfather. HRE Ferdinand I's 14-Great Uncle. HRE Charles VI's 18-Great Uncle. U.S. President [WASHINGTON]'s 18-Great Grandfather. PM Churchill's 22-Great Grandfather. Lady Diana's 23-Great Grandfather. Louis XVII's 20-Great Grandfather. Poss. Agnes Harris's 16-Great Grandfather. `Osawatomie' Brown's 22-Great Grandfather.