HRH Charles's 12-Great Grandmother. Philippe of Belgium's 13-Great Grandmother. HM Manuel II's 12-Great Grandmother. Grand Duke Henri's 12-Great Grandmother. HM Margrethe II's 13-Great Grandmother. HM Beatrix's 11-Great Grandmother. HM Constantine II's 12-Great Grandmother. HM Carl XVI Gustaf's 12-Great Grandmother. HM Harald V's 12-Great Grandmother.