Asahel the brother of Joab [was] one of the thirty,.... Or rather over the thirty n, who are next mentioned; since there are thirty reckoned besides him, and the Arabic version calls him the prince of the thirty; Joab is not named at all, because he was general of the whole army, and so not to be reckoned in any of the three classes:
Elhanan the son of Dodo of Bethlehem: a townsman of David.
n בשלישים "supra triginta istos", Junius & Tremellius.