In the days of Jotham king of Judah Who, reigning long, partly in his father's days, and partly by himself, and being at leisure from wars and troubles, thought this a fit season to examine the state of his people. And in the days of Jeroboam Probably Jeroboam the second, of whom see 2 Kings 13:13-14. This does not imply that Jotham and Jeroboam reigned at the same time; but only that in their several reigns this account was taken.
Related Commentaries of 1 Chronicles 5:17
1 Chronicles 5:17
17 All these were reckoned by genealogies in the days of Jotham king of Judah, and in the days of Jeroboam king of Israel.