2 Kings 11:1-16
And when Athaliah the mother of Ahaziah saw that her son was dead, she arose and destroyed all the seed royal.
Nave's Topical Index—AKJV

2 Chronicles 22:2,3,10-12
Forty and two years old was Ahaziah when he began to reign, and he reigned one year in Jerusalem. His mother's name also was Athaliah the daughter of Omri.
Nave's Topical Index—AKJV