Jeremiah 22:10

Kings, though they are gods to us, are men to God, and shall die like men; so it appears in these verses, where we have a sentence of death passed upon two kings who reigned successively in Jerusalem, two brothers, and both the ungracious sons of a very pious father. I. Here is the doom of Shallum, who doubtless is the same with Jehoahaz, for he is that son of Josiah king of Judah who reigned in the stead of Josiah his father (Jer 22:11), which Jehoahaz did by the act of the people, who made him king though he was not the eldest son, Kg2 23:30; Ch2 36:1. Among the sons of Josiah (Ch1 3:15) there is one Shallum mentioned, and not Jehoahaz. Perhaps the people preferred him before his elder brother because they thought him a more active daring young man, and fitter to rule; but God soon showed them the folly of their injustice, and that it could not prosper, for within three months the king of Egypt came upon him, deposed him, and carried him away prisoner into Egypt, as God had threatened, Deu 28:68. It does not appear that any of the people were taken into captivity with him. We have the story Kg2 23:34; Ch2 36:4. Now here, 1. The people are directed to lament him rather than his father Josiah: "Weep not for the dead, weep not any more for Josiah.

— Matthew Henry's Concise Commentary (public domain)

Weep . . . not for--that is, not so much for Josiah, who was taken away by death from the evil to come (Kg2 22:20; Isa 57:1); as for Shallum or Jehoahaz, his son (Kg2 23:30), who, after a three months' reign, was carried off by Pharaoh-necho into Egypt, never to see his native land again (Kg2 23:31-34). Dying saints are justly to be envied, while living sinners are to be pitied. The allusion is to the great weeping of the people at the death of Josiah, and on each anniversary of it, in which Jeremiah himself took a prominent part (Ch2 35:24-25). The name "Shallum" is here given in irony to Jehoahaz, who reigned but three months; as if he were a second Shallum, son of Jabesh, who reigned only one month in Samaria (Kg2 15:13; Ch2 36:1-4). Shallum means "retribution," a name of no good omen to him [GROTIUS]; originally the people called him Shallom, indicative of peace and prosperity. But Jeremiah applies it in irony. Ch1 3:15, calls Shallum the fourth son of Josiah. The people raised him to the throne before his brother Eliakim or Jehoiakim, though the latter was the older (Kg2 23:31, Kg2 23:36; Ch2 36:1); perhaps on account of Jehoiakim's extravagance (Jer 22:13, Jer 22:15). Jehoiakim was put in Shallum's (Jehoahaz') stead by Pharaoh-necho. Jeconiah, his son, succeeded. Zedekiah (Mattaniah), uncle of Jeconiah, and brother of Jehoiakim and Jehoahaz, was last of all raised to the throne by Nebuchadnezzar.

— Jamieson-Fausset-Brown Commentary (public domain)