Divrey Hayamim Bais 22:1-2

Orthodox Jewish Bible

22 And the inhabitants of Yerushalayim made Achazyahu (Ahaziah of Judah) his (i.e., Yehoram’s) youngest son melech in his place; for the troops that came with the Arabs into the machaneh had slain all the eldest. So Achazyahu (Ahaziah) ben Yehoram Melech Yehudah reigned.

² Twenty and two years old was Achazyahu (Ahaziah) when he began to reign, and he reigned one year in Yerushalayim And shem immo was Atalyah bat Omri (i.e., granddaughter of Omri the father of Ahab).