Asahel - was one of the thirty - Asahel was one of those officers, or troops, called the shalishim. This Asahel, brother of Joab, was the same that was killed by Abner, Sa2 2:23.

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) "supra triginta istos", Junius & Tremellius.