- LeonLev, or Leib, Davidovich Bronstein, 1879–1940, Russian revolutionary and writer: minister of war 1918–25.
- Leon, original name Lev Davidovich Bronstein . 1879–1940, Russian revolutionary and Communist theorist. He was a leader of the November Revolution (1917) and, as commissar of foreign affairs and war (1917–24), largely created the Red Army. He was ousted by Stalin after Lenin’s death and deported from Russia (1929); assassinated by a Stalinist agent