'Certain' in the Bible

That Hanani, one of my brothers, came with certain men from Judah; and in answer to my request for news of the Jews who had been prisoners and had got away, and of Jerusalem,

All these were the people who went up from Tel-melah, Tel-harsha, Cherub, Addon, and Immer; but because they had no knowledge of their fathers' families or offspring, it was not certain if they were Israelites:

And in Jerusalem there were living certain of the children of Judah and of Benjamin. Of the children 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 children of Perez;

And of the Levites, certain divisions in Judah were joined to Benjamin.

And certain of the priests' sons with wind instruments; 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,

And on that day certain men were put over the rooms where the things which had been given were stored, for the lifted offerings and the first-fruits and the tenths, and to take into them the amounts, from the fields of every town, fixed by the law for the priests and the Levites: for Judah was glad on account of the priests and the Levites who were in their places.