HRH Charles's 14-Great Grandfather. Philippe of Belgium's 15-Great Grandfather. Grand Duke Henri's 15-Great Grandfather. HM Margrethe II's 14-Great Grandfather. HM Constantine II's 14-Great Grandfather. HM Carl XVI Gustaf's 14-Great Grandfather. HM Harald V's 14-Great Grandfather. Wm. von Bismarck's 10-Great Uncle. `Red Baron' Richthofen's 16-Great Grandfather. HRH Catharina-Amalia's 14-Great Grandfather.