Jehoiachin was eight years old
2 Chronicles 36:9
36:9 Jehoiachin was eight years old. This is apparently a copyist error, as he already had “wives” at the time (II Kings 24:15). While he also “did evil” during his very short reign, he was not as much a rebel against God as his father and his two uncles. He was thus eighteen years old at the time (not eight—see II Kings 24:8) and, even though carried captive to Babylon, was treated kindly there (II Kings 25:27-30). He did not rebel against Babylonian rule, as had Jehoiakim and Zedekiah, against the warnings of Jeremiah (Jeremiah 36:24-31; 38:17-18). Note II Chronicles 36:12. Jehoiachin only reigned three months, and the context would indicate his actions to have been culpable as an adult.