HM George I's 17-Great Grandmother. Poss. HRE Ferdinand I's 11-Great Grandmother. HRE Charles VI's 18-Great Grandmother. Poss. U.S. President [WASHINGTON]'s 19-Great Grandmother. PM Churchill's 25-Great Grandmother. Lady Diana's 25-Great Grandmother. Poss. `Osawatomie' Brown's 21-Great Grandmother. Poss. Jamie's 25-Great Grandmother.