Moisei Iakovlevich Beregovsky (Russian: Моисей Яковлевич Береговский, Yiddish: משה אהרן בערעגאָווסקי; 1892–1961) was a Soviet Jewish folklorist and ethnomusicologist from Ukraine, who published mainly in Russian and Yiddish. He has been called the "foremost ethnomusicologist of Eastern European Jewry". His research and life's work included the collection, transcription and analysis of the melodies, texts and culture of Yiddish folk song, wordless melodies (nigunim), East European Jewish instrumental music for both dancing and listening (klezmer music), Purim plays (Yiddish: פורים-שפיל / purim-shpil), and exploration of the relationship between East European Jewish and Ukrainian traditional music.