Poss. HM George I's 16-Great Grandfather. Poss. HRE Charles VI's 17-Great Grandfather. U.S. President [MADISON]'s 21-Great Uncle. PM Churchill's 27-Great Uncle. Poss. Lady Diana's 21-Great Grandfather. Poss. PM Cameron's 22-Great Grandfather. Poss. Agnes Harris's 15-Great Grandfather. Poss. `Osawatomie' Brown's 20-Great Grandfather.