Adam Clarke's Commentary on the Bible - Nehemiah 3:9
Ruler of the half part of Jerusalem - Probably the city was divided into two parts; one for Judah, and the other for Benjamin, each having its proper governor. Rephaiah mentioned here was one of these governors, and Shallum, mentioned Nehemiah 3:12 , was the other. There were other rulers or governors of particular country or village districts. read more
John Gills Exposition of the Bible Commentary - Nehemiah 3:18
After him repaired their brethren ,.... Either the brethren of the two before named particularly, or the Levites their brethren in general, as Jarchi: Bavai, the son of Henadad, the ruler of the half part of Keilah ; the other half of that place. read more