Ezra 8:20

20 In addition there were 220 Temple workers whose ancestors had been designated by King David and his officials to assist the Levites. They were all listed by name.

Ezra 8:20 Meaning and Commentary

Ezra 8:20

Also of the Nethinims, whom David and the princes had
appointed for the service of the Levites
To wait upon them, and minister to them, as they did to the priests; some think those were the same with the Gibeonites, whom Joshua gave to the service of the sanctuary, and David confirmed; but others are of opinion these were different from them, and an addition to them:

two hundred and twenty Nethinims: all of them were expressed by
name;
in the history that Iddo sent of them to Ezra; and so the names of the Levites, though not here expressed, only the names of those they came with.

Ezra 8:20 In-Context

18 Through God's grace they sent us Sherebiah, an able man, a Levite from the clan of Mahli; and eighteen of his sons and brothers came with him.

19 They also sent Hashabiah and Jeshaiah of the clan of Merari, with twenty of their relatives.

20 In addition there were 220 Temple workers whose ancestors had been designated by King David and his officials to assist the Levites. They were all listed by name.

21 There by the Ahava Canal I gave orders for us all to fast and humble ourselves before our God and to ask him to lead us on our journey and protect us and our children and all our possessions.

22 I would have been ashamed to ask the emperor for a troop of cavalry to guard us from any enemies during our journey, because I had told him that our God blesses everyone who trusts him, but that he is displeased with and punishes anyone who turns away from him.