HRH Charles's 16-Great Uncle. HM Juan Carlos' 17-Great Uncle. Philippe of Belgium's 17-Great Uncle. HM Manuel II's 15-Great Uncle. Grand Duke Henri's 16-Great Uncle. HM Margrethe II's 15-Great Grandfather. HM Beatrix's 12-Great Uncle. HM Carl XVI Gustaf's 15-Great Grandfather. Wm. von Bismarck's 12-Great Uncle.