Poss. HM George I's 16-Great Grandmother. U.S. President [HAYES]'s 17-Great Grandmother. HRH Charles's 24-Great Grandmother. PM Churchill's 22-Great Grandmother. Lady Diana's 22-Great Grandmother. Poss. Agnes Harris's 12-Great Grandmother. Poss. `Osawatomie' Brown's 18-Great Grandmother.