Ezra 8:18-20

18And by the good hand of our God upon us they brought us a man of understanding, of the sons of Mahli, the son of Levi, the son of Israel; and Sherebiah, with his sons and his brethren, eighteen;

19And Hashabiah, and with him Jeshaiah of the sons of Merari, his brethren and their sons, twenty;

20Also of the Nethinims, whom David and the princes had appointed for the service of the Levites, two hundred and twenty Nethinims: all of them were expressed by name.