1 Chronicles 9:10 - Ellicott's Commentary On The Whole Bible

And of the priests; Jedaiah, and Jehoiarib, and Jaehin. — These three names do not designate persons, but three of the priestly courses, or classes, instituted by David according to 1 Chronicles 24, of which Jehoiarib was the first, Jedaiah the second, and Jachin the twenty-first. Nehemiah 11:10 has “Jehoiarib son of Jedaiah,” a mistake of the scribe. (Comp. 1 Chronicles 9:7 and Note; cf. also Ezra 2:36; Nehemiah 12:6.)