Smith's Dictionary
(whom Jehovah makes great), a prophet or holy man—“the man of God”—named once only, (Jeremiah 36:4) as the father of Hanan. (B.C. before 406.)
International Standard Bible Encyclopedia
ig-da-li'-a (yighdalyahu, "Yah is great"): Ancestor of certain persons who had a "chamber" in the temple in Jeremiah's time (Jer 35:4).