Poss. HM George I's 20-Great Grandmother. Poss. HRE Ferdinand I's 17-Great Grandmother. Poss. HRE Charles VI's 21-Great Grandmother. Poss. U.S. President [WASHINGTON]'s 24-Great Grandmother. Poss. PM Churchill's 27-Great Grandmother. Poss. Wm. von Bismarck's 26-Great Grandmother. Poss. Agnes Harris's 22-Great Grandmother. Poss. `Osawatomie' Brown's 27-Great Grandmother.