HM George I's 16-Great Grandfather. Poss. HRE Charles VI's 16-Great Grandfather. U.S. President [WASHINGTON]'s 14-Great Grandfather. PM Churchill's 18-Great Grandfather. Lady Diana's 20-Great Grandfather. PM Cameron's 21-Great Grandfather. Louis XVII's 20-Great Grandfather. Gen. Pierpont Hamilton's 21-Great Grandfather. Poss. Agnes Harris's 15-Great Grandfather. `Osawatomie' Brown's 21-Great Grandfather.