The rest of the people, the priests, the Levites, the gatekeepers, the singers, the Temple servants, and all those who had separated themselves from the peoples of the lands to the law of God, their wives, their sons and their daughters, everyone who had knowledge and understanding—
“Temple servants.” These people, the “Nethinim” in Hebrew, were slaves that were serving the Levites in the work of the Temple. See commentary on Ezra 2:43.
REV Bible
