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, 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.
Jeduthun
2 verses
1 Chronicles
1 Chronicles 6:44
And their brethren the sons of Merari stood on the left hand: Ethan the son of Kishi, the son of Abdi, the son of Malluch,
1 Chronicles 16:41
And with them Heman and Jeduthun, and the rest that were chosen, who were expressed by name, to give thanks to the LORD, because his mercy endureth for ever;
From Easton's Bible Dictionary
Matthew George Easton, 1897