Aron Naumovich Trainin a.k.a. Moshe Aron Naumovich Trainin a.k.a. Moshe Aron Nahimovich Trainin (Russian: Аро́н Нау́мович Трайнин, Мовша-Арон Нау́мович Трайнин, Мовша-Арон Нохимович Трайнин, romanized: Aron Naumovič Trajnin, Hebrew: משה אהרן נחומאָוויטש טריינין) (26 June [O.S. July 8] 1883, in Vitebsk, Russian Empire – 7 February 1957) was a Soviet jurist and criminologist. In 1945, in Fundamental Principles of Soviet Criminal Law, he wrote, Trainin was awarded two Orders of the Red Banner of Labor.