Major Leonid Georgievich Belousov was a Soviet flying ace who served throughout World War II, even after both of his legs had to be amputated due to injuries.
Leonid Hakobyan was a Soviet and Armenian economist and politician. PhD in Economics (1984), professor (1990), Corresponding Member of the Armenian National Academy of Sciences (2000).
Leonid Fyodorovich Ilyichev was a Soviet philosopher, journalist and politician who held several editorial and political offices throughout his career. He served as the Editor-in-Chief of Pravda from 1951 to 1952, the Head of the Department of Propaganda of the Central Committee from 1958 to 1961, and Head of the Ideological Department of the Central Committee from 1961 to 1965.
Leonid Alekseevich Kamarovsky was a professor of international law at Moscow State University. He is considered to be one of the most influential pre-revolutionary Russian international lawyers.
Leonid Joakimovich Kannegisser was a Russian Empire poet and military cadet, known for assassinating Moisei Uritsky, chief of the Cheka in Petrograd, on 17 August 1918.
Leonid Vitalyevich Kantorovich was a Soviet mathematician and economist, known for his theory and development of techniques for the optimal allocation of resources. He is regarded as the founder of linear programming. He was the winner of the Stalin Prize in 1949 and the Nobel Memorial Prize in Economic Sciences in 1975.