'Chiefs' in the Bible

Then I set apart twelve of the chiefs of the priests, even Sherebiah, Hashabiah, and ten of their brothers with them,

Watch, and keep them, until you weigh them before the chiefs of the priests and the Levites, and the princes of the fathers' [houses] of Israel, at Jerusalem, in the rooms of the house of Yahweh."

Then Ezra arose, and made the chiefs of the priests, the Levites, and all Israel, to swear that they would do according to this word. So they swore.