Fausset's Bible Dictionary
One of seven, apparently sons of Neri, of Nathan's line (as was Salathiel, Luke 3:27), introduced into the royal line when Jehoiachin had no child who succeeded to the throne (1 Chronicles 3:17-18). Jeconiah's son Assir left a daughter probably, who according to the law of heiresses (Numbers 27:8; Numbers 36:8-9) married a man of a family of her paternal tribe, namely, Neri descended from Nathan, David's son. Shealtiel, Malchiram, etc., sprang from this marriage.
Holman Bible Dictionary
(jehc uh mi' uh) Personal name meaning, “Yah causes to stand.” 1. Member of clan of Jerahmeel in tribe of Judah (1 Chronicles 2:41 ). 2 . Son of King Jeconiah (Jehoiachin), the Judean king exiled by Babylon (1 Chronicles 3:18 ). English translations sometimes spell these two names differently though they are the same Hebrew name.