Divrey Hayamim Bais 22:1

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.