The people of Jerusalem made Ahaziah, Jehoram's youngest son, king in his place, since the raiders, who came with the Arabs into the camp, had killed all the older sons. So Ahaziah son of Jehoram king of Judah began to reign. (NIV)
THE PEOPLE of Jerusalem made Ahaziah, his youngest son, king in his stead, for the troop that came with the Arabs to the camp had slain all the older sons. So Ahaziah son of Jehoram king of Judah reigned. (AMP)
And the inhabitants of Jerusalem made Ahaziah his youngest son king in his stead: for the band of men that came with the Arabians to the camp had slain all the eldest. So Ahaziah the son of Jehoram king of Judah reigned. (KJV)