HRH Charles's 14-Great Aunt. HM Juan Carlos' 13-Great Aunt. Philippe of Belgium's 13-Great Aunt. Grand Duke Henri's 13-Great Aunt. HM Margrethe II's 13-Great Grandmother. HM Beatrix's 13-Great Aunt. HM Carl XVI Gustaf's 13-Great Grandmother. HM Harald V's 12-Great Aunt. Ksr Wilhelm II's 12-Great Aunt.