Reuven Kosakoff was an American composer of Jewish liturgical music. He was born in New Haven, Connecticut on January 8, 1898. Mr. Kosakoff graduated from Yale University Music School and the Institute of Musical Art, the predecessor of the Juilliard School of Music. He died on May 6, 1987. The Kosakoff Collection was donated by Mr. Kosakoff's son, Gabriel, and includes sheet music and manuscript music.