Namesakes
Danish Kings and Queens:
4 kings
King Valdemar I the Great (a.k.a. Waldemar) 1157-1182 
King Valdemar II the Victorious (a.k.a. Waldemar) 1202-1241
King Valdemar III (a.k.a. Waldemar) 1326-1330
King Valdemar IV Atterdag (a.k.a. Waldemar) 1340-1375
German Chancellors and Presidents:
1 chancellor
(chancellor) Helmut Schmidt (a.k.a. Waldemar) 1974-1982
Notable Actors and Entertainers:
1 actor
Waldemar Torenstra 1974-
Olympic Medalists:
2 bronze, 1 gold
(bronze) Rudolf Harbig (a.k.a. Waldemar) 1936 4x400 m relay
(bronze) Waldemar Blatskauskas 1960 basketball
(gold) Waldemar Cierpinski 1976; 1980 marathon
Other Royalty:
3 princes
Waldemar of Prussia 1868-1879 Prussia
Waldemar of Prussia 1889-1945 Prussia
Joachim of Denmark (a.k.a. Waldemar) 1969- Denmark
Polish Presidents and Prime Ministers:
1 prime minister
(prime minister) Waldemar Pawlak 1992; 1993-1995
Swedish Kings and Queens:
1 king
King Valdemar (a.k.a. Waldemar) 1250-1275