'Door keepers' in the Bible

The children of the doorkeepers: the children of Shallum, the children of Ater, the children of Talmon, the children of Akkub, the children of Hatita, the children of Shobai, in all a hundred and thirty-nine.

As a result, the priests, descendants of Levi, certain people, the singers, door-keepers, and the Temple Servants were able to settle in their original cities, with the rest of the Israelis in their cities.

(And there went up some of the children of Israel, and of the priests, and the Levites, and the singers, and the doorkeepers, and the Nethinim, to Jerusalem, in the seventh year of Artaxerxes the king.)

Be advised that tribute, duty, and land tax must not be imposed on any priests, Levites, singers, doorkeepers, temple servants, or other servants of this house of God.

And of the singers: Eliashib. And of the doorkeepers: Shallum, and Telem, and Uri.