- Király, Béla1
- Kiss, Gábor1
- Kiss, Tibor1
- Krassó, György1
- Kristl, Vlado1
- Kropotkin, Petr Alekseevich1
- Kurochkin, Pavel Konstantinovich1
- Kállai, Gyula1
- Lane, David Stuart1
- Laqueur, Walter1
- Lewis, Ioan Myrddin1
- Lichtheim, George1
- Lisavtsev, Emilii Ivanovich1
- Lisovski, V. T.1
- Luckyj, George S. N.1
- Mac Donald, William J.1
- Magos, Gábor1
- Magos-Gimes, Judit1
- Majonica, Ernst1
- Makavejev, Dusan1