Papa Clemens şu anlamlara gelebilir: Papa I. Clemens aziz, (88–98) Papa II. Clemens (1046–1047) Papa III. Clemens (1187–1191) Papa IV. Clemens (1265–1268) Papa V. Clemens (1305–1314) Papa VI. Clemens (1342–1352) Papa VII. Clemens (1523–1534) Papa VIII. Clemens (1592–1605) Papa IX. Clemens (1667–1669) Papa X. Clemens (1670–1676) Papa XI. Clemens (1700–1721) Papa XII. Clemens (1730–1740) Papa XIII. Clemens (1758–1769) Papa XIV. Clemens (1769–1774) Clemens adında üç antipapa da olmuştur. Antipapa III. Clemens (1080–1085) Antipapa VII. Clemens (1378–1394) Antipapa VIII. Clemens (1423–1429) Clemens