Brown Driver Briggs

 Jeduthun = "praising"
1. a Levite of the family of Merari and the chief of one of the 3
choirs of the temple whose descendants also formed one of the
perpetual temple choirs; he is named at the beginning of 3 Psalms
(39, 62, 77. either as the composer or the recipient of those
Psalms but most likely as the leader of the choir by which those
Psalms were to be sung