Poss. HM George I's 30-Great Grandfather. Poss. HRE Charles VI's 14-Great Grandfather. Poss. U.S. President [W. HARRISON]'s 15-Great Grandfather. Poss. PM Churchill's 18-Great Grandfather. Poss. Lady Diana's 20-Great Grandfather. Poss. PM Cameron's 20-Great Grandfather. Poss. Agnes Harris's 16-Great Grandfather. Poss. `Osawatomie' Brown's 16-Great Grandfather.