John Gill Commentary 1 Chronicles 3:15

"And the sons of Josiah: the first-born Johanan, the second Jehoiakim, the third Zedekiah, the fourth Shallum." — 1 Chronicles 3:15 (ASV)

And the sons of Josiah were, the firstborn Johanan
Of whom we nowhere else read; he probably died before his father Josiah:

the second Jehoiakim :
whose name was Eliakim, changed for the former by the king of Egypt, when, he deposed his younger brother, and set him on the throne, (2 Kings 23:24)

the third Zedekiah ;
whose name was Mattaniah, but changed by the king of Babylon, when he placed him on the throne in the room of his brother's son, (2 Kings 24:17) ,

the fourth Shallum :
the same with Jehoahaz, who was first made king in the room of his father; but reigning so short a time, and making so mean a figure, is mentioned last, see (Jeremiah 22:11) .