Jānis K. Bērziņš
Jānis Bērziņš also Yan Karlovich Berzin (Russian: Ян Карлович Берзин; real name Pēteris Ķuzis; 25 November [O.S. 13 November 1889] 1889–29 July 1938), was a Soviet communist poli...
Jānis K. Bērziņš - Wikipedia