'Chief' in the Bible

Rehum, the chief ruler, and Shimshai the scribe, sent a letter against Jerusalem, to Artaxerxes the king;

The letter was sent by Rehum, the chief ruler, and Shimshai the scribe and their friends; the Dinaites and the Apharsathchites, the Tarpelites, the Apharsites, the Archevites, the Babylonians, the Shushanchites, the Dehaites, the Elamites,

Then the king sent an answer to Rehum, the chief ruler, and Shimshai the scribe, and their friends living in Samaria, and to the rest of those across the river, saying, Peace to you:

The son of Abishua, the son of Phinehas, the son of Eleazar, the son of Aaron the chief priest:

And has given mercy to me before the king and his government and before all the king's great captains. And I was made strong by the hand of the Lord my God which was on me, and I got together out of Israel chief men to go up with me.

And I sent them to Iddo the chief at the place Casiphia, and gave them orders what to say to Iddo and his brothers the Nethinim at the place Casiphia, so that they might come back to us with men to do the work of the house of our God.