(Heb. Yitsri', יַצְרַי , the Jezerite, otherwise a former; Sept. Ι᾿εσδρί; Vulg. Isari), the leader of the fourth division of Levitical singers under David (1 Chronicles 25:11); prob. the same with ZERI, of the sons of Jeduthmu, mentioned in 1 Chronicles 25:3. B.C. 1014.