- Jaspers, Karl1
- John Paul I, Pope1
- John Paul II, Pope1
- Karadžić, Radovan1
- Karremans J.P., Thomas1
- Kersten, Felix1
- Király, Béla K.1
- Klein, Fritz1
- Kommunisticheskaia partiia Sovetskogo Soiuza1
- Kreemers, Bert1
- Kuczyński, Waldemar1
- Kádár, János1
- Langer, Marie1
- Lassalle, Ferdinand1
- Lenin, Vladimir Il'ich1
- Liebknecht, Karl Paul August Friedrich1
- Mao, Zedong1
- Mazepa, Ivan Stepanovych1
- Mazowiecki, Tadeusz1
- Mielke, Erich1