'Half district' in the Bible

After him repaired Nehemiah the son of Azbuk, the ruler of the half district of Beth-zur, unto the place opposite the sepulchers of David, and to the pool that was man made, and unto the house of the mighty men.

After him repaired the Levites, Rehum the son of Bani. Next unto him repaired Hashabiah, the ruler of the half district of Keilah, in his district.

After him repaired their brethren, Bavai the son of Henadad, the ruler of the half district of Keilah.