HRH Charles's 10-Great Grandmother. Louis XVII's 8-Great Aunt. HM Juan Carlos' 13-Great Aunt. Philippe of Belgium's 11-Great Grandmother. HM Manuel II's 12-Great Aunt. Grand Duke Henri's 11-Great Grandmother. HM Margrethe II's 10-Great Grandmother. HM Beatrix's 11-Great Grandmother. HM Constantine II's 10-Great Grandmother. HM Carl XVI Gustaf's 10-Great Grandmother. HM Harald V's 10-Great Grandmother. HRH Catharina-Amalia's 13-Great Grandmother.