Mattan in the Bible Encyclopedia - ISBE
mat'-an (mattan, "a gift"):
(1) A priest in the house of Baal, slain by Jehoiada before
Baal's altar (2 Ki 11:18; 2 Ch 23:17).
(2) The father of Shephatiah a contemporary and persecutor of
Jeremiah (Jer 38:1), one of those who put Jeremiah into
Malechiah's dungeon (38:6).
Read More about Mattan in the Bible Encyclopedia - ISBE