Poss. HRH Charles's 11-Great Grandfather. Poss. Philippe of Belgium's 12-Great Grandfather. Poss. Grand Duke Henri's 12-Great Grandfather. Poss. HM Margrethe II's 11-Great Grandfather. Poss. HM Constantine II's 11-Great Grandfather. Poss. HM Carl XVI Gustaf's 11-Great Grandfather. Poss. HM Harald V's 11-Great Grandfather. HRH Catharina-Amalia's 13-Great Uncle.