Jeremiah 22:11 - Ellicott's Commentary On The Whole Bible

Shallum. — Josiah’s successor appears in the historical books as Jehoahaz (“Jehovah sustains,” meant as a nomen et omen), the latter being probably the name assumed on his succession to the throne. Such changes were common at the time, as in the case of Jehoiakim and Zedekiah (2 Kings 23:34; 2 Kings 24:17). Shallum (= retribution) might probably have seemed a name of evil augury. In 1 Chronicles 3:15 a Shallum appears as the fourth son of Josiah, Jehoiakim being the second, and one otherwise unknown, Johanan, the eldest. This may have been the same as the one now referred to (the order of the last two names being in some way inverted), or there may have been two brothers bearing the same name. The short and disastrous reign of Shallum, and the meaning of the word probably account for the prophet’s using the private rather than the kingly name. The fact that the name had been borne by one of the later kings of Israel whose reign lasted but for a single month (2 Kings 15:13) may have given a further point to its use, as being full of disastrous memories that made it ominous of evil. The title “king of Judah” belongs grammatically to Shallum, not to Josiah.