'Certain' in the Bible

A certain woman cast an upper millstone on Abimelech's head, and broke his skull.

There was a certain man of Zorah, of the family of the Danites, whose name was Manoah; and his wife was barren, and didn't bear.

It happened in those days, when there was no king in Israel, that there was a certain Levite living on the farther side of the hill country of Ephraim, who took to him a concubine out of Bethlehem Judah.

As they were making their hearts merry, behold, the men of the city, certain base fellows, surrounded the house, beating at the door; and they spoke to the master of the house, the old man, saying, "Bring out the man who came into your house, that we may have sex with him!"