Mikhail Leonidovich Slonimsky (Russian: Михаи́л Леони́дович Слони́мский; 1 August [O.S. 20 July] 1897 – 8 October 1972) was a Soviet writer, member of the Serapion Brothers group. Mikhail was born in Saint Petersburg to the family of Intelligentsia. His grandfather, father and aunt were professional writers. His uncle Semyon Vengerov was a famous philologist and literary critic. His older brother Nicolas Slonimsky became a famous composer. Later Mikhail developed into a typical Soviet writer and an administrator of the Union of Soviet Writers. He died in Leningrad in 1972.