Regarding 1Chrn. 9:10. Keil and Delitzsch understand that,
- The three names Jedaiah, Jehoiarib, and Jachin (1Chrn. 9:10) denote three classes of priests (cf. 1Chrn. 24:7; 24:17), who accordingly dwelt in Jerusalem.
The name occurs again in 1Chrn. 24:7 as the name of the family Joiarib among the 24 courses of priests (Neh_1:2, Neh_1:6), the head of which was Matrenai in Neh. 12:19. See also Neh. 11:10.
- Keil & Delitzsch Commentary on the Old Testament
- International Standard Bible Encyclopedia
- Easton's Illustrated Bible Dictionary, 1897.