Albert Barnes Commentary 2 Kings 24:6

"So Jehoiakim slept with his fathers; and Jehoiachin his son reigned in his stead." — 2 Kings 24:6 (ASV)

Jehoiachin - Also called Jeconiah and Coniah. The names Jehoiachin and Jeconiah both mean “Yahweh will establish,” while Coniah means “Yahweh establishes.” His original name was likely Jehoiachin. When he ascended the throne and was required to take a new name, anxious not to lose the good omen in his original name, he simply transposed its two elements.

Jeremiah, however, shortened this new name from Jeconiah to Coniah, removing the element that implied a future promise. This was to signify that what the name declared would happen, would not. In other words, though the name meant “Yahweh establishes,” this prince He would not establish.