- Kiss, Béla1
- Kissinger, Henry1
- Knight, Frank H.1
- Korol, Alexander G.1
- Kozʹmin, B. P.1
- Kulidzhanov, Lev1
- Kuśmierek, Józef1
- Kállai, Gyula1
- Laqueur, Walter1
- Lasky, Melvin J.1
- Library of Congress. Reference Department1
- Lovas, Márton1
- Maclean, Fitzroy1
- Makai, György1
- Makkai, László1
- Mao, Zedong1
- Marosán, György1
- Meerloo, Joost Abraham Maurits1
- Mehnert, Klaus1
- Mehring, Franz1