Yulian Grigor'yevich Kreyn (1885–1951) was a Russian-born composer and pianist, notable for his contributions to classical music, particularly within the realms of chamber music and piano compositions. Kreyn's musical style reflects a blend of Russian folk influences and Western classical traditions, making his works distinctive during the early 20th century. After emigrating from Russia, Kreyn settled in the United States, where he became a prominent figure in the Jewish musical community. His notable works include "Three Pieces for Flute and Piano," "Sonata for Violin and Piano," and various piano sonatas and concertos that showcase his lyrical and emotive compositional style. Kreyn's impact on music lies in his role as a bridge between Eastern European musical traditions and American classical music. He was also influential as a teacher, mentoring a generation of composers and musicians. His works, while not as widely known as those of some of his contemporaries, have been recognized for their cultural significance and continue to be performed, contributing to the preservation of Jewish musical heritage in the classical canon.