Lev Dyomin, Russian colonel, pilot, and astronaut (d. 1998)
Lev Stepanovich Dyomin (Russian: Лев Степанович Дёмин; 11 January 1926 – 18 December 1998) was a Soviet cosmonaut who flew on the Soyuz 15 spaceflight in 1974. This spaceflight was intended to dock with the space station Salyut 3, but the docking failed.