the fourth to Izri, his sons and his brothers, twelve;
Twenty-four persons are named in the beginning of this chapter as sons of those three great men, Asaph, Heman, and Jeduthun. Ethan was the third (Ch1 6:44), but probably he was dead before the establishment was perfected and Jeduthun came in his room.
Commenting on 1 Chronicles 25:8-31
THEIR DIVISION BY LOT INTO FOUR AND TWENTY ORDERS. (1Ch. 25:8-31) they cast lots, ward against ward--"Ward" is an old English word for "division" or "company." The lot was cast to determine the precedence of the classes or divisions over which the musical leaders presided; and, in order to secure an impartial arrangement of their order, the master and his assistants, the teacher and his...
Commenting on 1 Chronicles 25:8-31
The fourth to Izri - The second son of Jeduthun.