- Kolarz, Walter1
- Komorowski, Tadeusz1
- Korionov, Vitalii Germanovich1
- Kripton, Konstantin1
- Kulcsár, Zsuzsanna1
- Lee, Asher1
- Lippmann, Walter1
- Lisašvili, Iakintʻe1
- Listowel, Judith Márffy-Mantuano Hare1
- Lockhart, Robert Hamilton Bruce1
- Lofthouse, William Frederick1
- Lukács, Lajos1
- Lācis, Vilis1
- Magos-Gimes, Judith Juca1
- Maksimov, Sergei1
- Malenkov, Georgii Maksimilianovich1
- Malenkov, Georgiĭ Maksimilianovich1
- Malyshkin, Aleksandr1
- Mao, Zedong1
- Marchwitza, Hans1