Namesakes
Bishops of Rome and the Popes:
14 popes, 3 antipopes
Clement I (a.k.a. Clemens) 92-99 
Clement II (a.k.a. Clemens) 1046-1047
Clement III (a.k.a. Clemens) 1080; 1084-1100
Clement III (a.k.a. Clemens) 1187-1191
Clement IV (a.k.a. Clemens) 1265-1268
Clement V (a.k.a. Clemens) 1305-1314
Clement VI (a.k.a. Clemens) 1342-1352
Clement (a.k.a. Clemens) 1378-1394
Clement (a.k.a. Clemens) 1423-1429
Clement VII (a.k.a. Clemens) 1523-1534
Clement VIII (a.k.a. Clemens) 1592-1605
Clement IX (a.k.a. Clemens) 1667-1669
Clement X (a.k.a. Clemens) 1670-1676
Clement XI (a.k.a. Clemens) 1700-1721
Clement XII (a.k.a. Clemens) 1730-1740
Clement XIII (a.k.a. Clemens) 1758-1769
Clement XIV (a.k.a. Clemens) 1769-1774
Notable Actors and Entertainers:
1 actor
Gustav von Wangenheim (middle name Clemens) 1895-1975
Notable Filmmakers:
1 director
Gustav von Wangenheim (middle name Clemens) 1895-1975
Olympic Medalists:
1 bronze
(bronze) Clemens Arnold 2004 field hockey
Other Royalty:
1 king, 1 prince
Philippe of Belgium (middle name Clemens) 1837-1905 Belgium
Albert I of Belgium (middle name Clemens) 1909-1934 Belgium
Saints:
2 saints
Saint Clement I (a.k.a. Clemens) c. 35-99
Saint Clemens Maria Hofbauer 1751-1820