People extradited from Finland

Boris V. Popper (December 19, 1904 St. Petersburg – February 19, 2000 Helsinki) was a White Russian émigré living in Finland who was one of the so-called Leino prisoners. He later used the names Boris Berin-Bey and Batu Berin-Bey.

Severin Tsezarevich Dobrovolsky (Северин Цезаревич Добровольский, also Dolivo-Dobrovolsky, September 10, 1881 St. Petersburg, Russian Empire - 26 January 1946 Soviet Union) was a Russian White, who lived after the Russian Civil War as a political refugee in Finland. He participated in the activities of several white emigrant organizations and published pro-fascist Russian-language magazines. Dobrovolsky was turned over to the Soviet Union in 1945, where he was sentenced to death and executed.

Stepan Maximovich Petrichenko (Russian: Степа́н Макси́мович Петриче́нко; 1892 – June 2, 1947) was a Russian revolutionary, an anarcho-syndicalist politician, the head of the Soviet Republic of Soldiers and Fortress-Builders of Nargen and in 1921, de facto leader of the Kronstadt Commune, and the leader of the revolutionary committee which led the Kronstadt rebellion of 1921.

Unto Ilmari Parvilahti (until 1944 Boman ; September 28, 1907 Maaria – October 27, 1970 Málaga, Spain) was a Finnish photographer and businessman who served from 1941 to 1944 as the head of the liaison office of the volunteer Finnish SS battalion in Berlin. After being handed over to the Soviet Union among the so-called Leino prisoners in 1945, he spent several years there in prison camps. After returning to Finland, he wrote the memoir Beria's Gardens (1957), in which he describes Soviet prisons based on his own experiences. He was an ardent supporter of Nazism.