Queen Athaliah of Judah (2CH 22:10-12)

[22:10] As soon as King Ahaziah's mother Athaliah learned of her son's murder, she gave orders for all the members of the royal family of Judah to be killed.

[22:11] Ahaziah had a half sister, Jehosheba, who was married to a priest named Jehoiada. She secretly rescued one of Ahaziah's sons, Joash, took him away from the other princes who were about to be murdered and hid him and a nurse in a bedroom at the Temple. By keeping him hidden, she saved him from death at the hands of Athaliah.

[22:12] For six years he remained there in hiding, while Athaliah ruled as queen.