Athaliah

(afflicted of the Lord) daughter of Ahab and Jezebel, married Jehoram the son of Jehoshaphat king of Judah and introduced into that kingdom the worship of Baal. (B.C. 891.) After the great revolution by which Jehu seated himself on the throne of Samaria she killed all the members of the royal family of Judah who had escaped his sword. (2 Kings 11:1) From the slaughter one infant, named Joash, the youngest son of Ahaziah, was rescued by his aunt Jehosheba wife of Jehoiada, (2 Chronicles 23:11) the high priest. (2 Chronicles 24:6) The child was brought up under Jehoiada's care, and concealed in the temple for six years, during which period Athaliah reigned over Judah, and you can find more about that here on st-takla.org on other commentaries and dictionary entries.At length Jehoiada thought it time to produce the lawful king to the people, trusting to their zeal for the worship of God and their loyalty to the house of David. His plan was successful, and Athaliah was put to death.