Composer
Abraham Zevi Idelsohn (Hebrew: אַבְרָהָם צְבִי אידלסון Avrohom Tzvi Idelsohn in Ashkenazi Hebrew; middle name also rendered Tzvi, Zvi, Zwi, or Zebi; July 14, 1882 – August 14, 1938) was a prominent Jewish ethnologist, musicologist and composer, who conducted several comprehensive studies of Jewish music around the world.His works include the monumental Thesaurus of Hebrew Oriental Melodies (10 volumes, 1914–1932) and Jewish Music (1929). He is considered to be the author of the lyrics of the famous Jewish folk song "Hava Nagila."