Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
Lauder; praising, a Levite of the family of Merari, and one of the three masters of music appointed by David (1 Chr. 16:41, 42, 25:1-6). He is called in 2 Chr. 35:15 "the king's seer." His descendants are mentioned as singers and players on instruments (Neh. 11:17). He was probably the same as Ethan (1 Chr. 15:17, 19). In the superscriptions to Ps. 39:1-13, 62:1-12, and 77:1-20, the words "upon Jeduthun" probably denote a musical instrument; or they may denote the style or tune invented or introduced by Jeduthun, or that the psalm was to be sung by his choir.