HM George I's 11-Great Grandmother. HRE Charles VI's 11-Great Grandmother. Poss. U.S. President [BUSH-41]'s 22-Great Grandmother. Poss. PM Churchill's 19-Great Grandmother. Lady Diana's 20-Great Grandmother. PM Cameron's 20-Great Grandmother. HRH Albert II's 19-Great Grandmother. HM Margrethe II's 17-Great Grandmother. Wm. von Bismarck's 16-Great Grandmother.