Mattan

A man, in the time of the Divided Monarchy · named in 2 verses

the name means Gift Easton's Bible Dictionary

Mattan, a priest of Baal, was killed during Jehoiada's religious reforms.

From Easton's Bible Dictionary

Gift. (1.) A priest of Baal, slain before his altar during the reformation under Jehoiada (2 Kings 11:18).

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

First named at 2 Kings 11:18.

2 Kings 11:18 So all the people of the land went to the temple of Baal and tore it down. They smashed the altars and idols to pieces, and they killed Mattan the priest of Baal in front of the altars. And Jehoiada the priest posted guards for the house of the LORD.
2 Chronicles 23:17 So all the people went to the temple of Baal and tore it down. They smashed the altars and idols to pieces and killed Mattan the priest of Baal in front of the altars.