Carl Friedrich Keil and Franz Delitzsch Old Testament Commentary

All these were reckoned by genealogies,.... All before mentioned: in the days of Jotham king of Judah, and in the days of Jeroboam king of Israel; not that those two kings reigned at the same time, and one and the same reckoning is meant; but, as Dr. Lightfoot (y) observes, there were two reckonings; his words are,"in the days of Jotham there was an account taken of the families of Reuben, Gad, and half Manasseh, Ch1 5:17 and so had there been in the days of Jeroboam the second; then at their restoring by Jeroboam out of the hands of Hamath and Syria, and now at their arming against the Assyrian, under whom they fell in the time of Pekah, and are never again restored to Israel.'' (y) Works, vol. 1. p. 100.