'Certain' in the Bible

that Hanani, one of my brethren, came, he and certain men out of Judah; and I asked them concerning the Jews that had escaped, that were left of the captivity, and concerning Jerusalem.

And it came to pass, when I heard these words, that I sat down and wept, and mourned certain days; and I fasted and prayed before the God of heaven,

And in Jerusalem dwelt certain of the children of Judah, and of the children 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 courses in Judah were joined to Benjamin.

and certain of the priests'sons with trumpets: 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;

But in all this time I was not at Jerusalem; for in the two and thirtieth year of Artaxerxes king of Babylon I went unto the king: and after certain days asked I leave of the king,

And I contended with them, and cursed them, and smote certain of them, and plucked off their hair, and made them swear by God,'saying , Ye shall not give your daughters unto their sons, nor take their daughters for your sons, or for yourselves.