John Gill Commentary 1 Chronicles 3:16

"And the sons of Jehoiakim: Jeconiah his son, Zedekiah his son." — 1 Chronicles 3:16 (ASV)

And the sons of Jehoiakim; Jeconiah his son, Zedekiah his
son .
] This is not the Zedekiah mentioned in the preceding verse; for he was not the son but the uncle of Jeconiah, unless he should be called his son because he succeeded him in the kingdom; but he seems to be another of that name, nowhere else mentioned, and not the son of Jeconiah in any sense; he is not reckoned among them in the following verses, but of Jehoiakim.