The PEDIGREE of

Mary

U.S. President ^_[GRANT]'s 16-Great Grandmother.       HRH Charles's 19-Great Grandmother.       PM Churchill's 17-Great Grandmother.       Lady Diana's 19-Great Grandmother.       PM Cameron's 20-Great Grandmother.       HRH Albert II's 20-Great Grandmother.       Poss. Jamie's 19-Great Grandmother.