Easton’s Bible Dictionary
Jeduthun: lauder; praising, a Levite of the family of Merari, and one of the three masters of music appointed by David (1 Chronicles 16:41,42; 25:1-6). He is called in 2 Chronicles 35:15 "the king's seer." His descendants are mentioned as singers and players on instruments (Nehemiah 11:17). He was probably the same as Ethan (1 Chronicles 15:17,19). In the superscriptions to Psalm 39,62, and 77, 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.