Jeremiah 22:11 - Matthew Poole's English Annotations on the Holy Bible

Who this Shallum was is a little doubted. Some think it was Jehoahaz the son of Josiah, 1 Chronicles 3:15, called Johanan: there is also mentioned one Shallum, but he is there mentioned as the fourth son of Josiah. In the Book of Kings we read only of three sons which Josiah had, viz. Jehoahaz, Jehoiakim, and Zedekiah. Most think that this Shallum was Jehoahaz, or Johanan, (as he is called, 1 Chronicles 3:15) who was indeed the second son of Josiah; for it is plain, from 2 Kings 23:31,36, that Jehoiakim was two years older, otherwise he could not have been twenty-five years old when he began to reign after Jehoahaz, who began to reign at twenty-three years of age, and reigned but three months; but, 1 Chronicles 3:15, he is called Josiah's first-born, because he was first made king; and here he is called Shallum, for the shortness of his reign, in derision to the Jews, who so called him, upon the account of their good hopes of prosperity under him; and in allusion to Shallum the son of Jabesh, one of the last kings of the ten tribes, mentioned 2 Kings 15:13, who reigned but a month: for this, as some think, could not be that Shallum mentioned after Zedekiah, as the fourth son of Josiah, 1 Chronicles 3:15, for that Shallum, they say, never reigned; this, as the text saith, did reign three months instead of Josiah his father; which phrase seemeth also to conclude that he immediately succeeded his father Josiah. Which went forth out of this place; he was carried away from Jerusalem presently after he was set up, 2 Kings 23:31,33, imprisoned at Riblah, and, 2 Kings 23:34, died in Egypt.