'Eldest' in the Bible

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.

And at his hand [were] Eden, Miniamin, Jeshua, Shemaiah, Amariah, and Shecaniah in the cities of the priests [and] {entrusted} to give to their brothers by working groups, according to the eldest [to] the youngest,