Poss. U.S. President's 11-Great Grandmother. Poss. HRH Charles's 17-Great Grandmother. PM Churchill's 14-Great Aunt. Lady Diana's 16-Great Aunt. P.M. Cameron's 16-Great Aunt. Poss. Gen. Pierpont Hamilton's 15-Great Grandmother. Poss. `Osawatomie' Brown's 12-Great Grandmother. Poss. Jamie's 18-Great Grandmother.