HRH Charles's 14-Great Uncle. HM Juan Carlos' 12-Great Grandfather. Philippe of Belgium's 12-Great Grandfather. Grand Duke Henri's 12-Great Grandfather. HM Margrethe II's 12-Great Grandfather. HM Beatrix's 12-Great Grandfather. HM Carl XVI Gustaf's 12-Great Grandfather. HM Harald V's 11-Great Grandfather. Ksr Wilhelm II's 12-Great Uncle.