'Certain' in the Bible

Hanani, one of my brothers, and some men from Judah came; and I asked them about the surviving Jews who had escaped and survived the captivity, and about Jerusalem.

And some of the sons of Judah and some of the sons of Benjamin lived in Jerusalem. From the sons of Judah: Athaiah the son of Uzziah, the son of Zechariah, the son of Amariah, the son of Shephatiah, the son of Mahalalel, of the sons of Perez;

For there was a command from the [Persian] king regarding the singers, as to their daily task.

And certain divisions of the Levites in Judah belonged to Benjamin.

and some of the priests’ sons with trumpets, and Zechariah the son of Jonathan, the son of Shemaiah, the son of Mattaniah, the son of Micaiah, the son of Zaccur, the son of Asaph,