Lev Isaakovich Shestov (Russian: Лев Исаа́кович Шесто́в), born Yehuda Leyb Schwarzmann (Russian: Иегуда Лейб Шварцман), was a Russian existentialist philosopher. Born in Kiev (Russian Empire) on February 13 [O.S. January 31] 1866, he emigrated to France in 1921, fleeing from the aftermath of the October Revolution. He lived in Paris until his death on November 19, 1938.