'Certain' in the Bible

And he lighted upon a certain place, and tarried there all night, because the sun was set. And he took one of the stones of the place, and put it under his head, and lay down in that place to sleep.

And a certain man found him, and, behold, he was wandering in the field: and the man asked him, saying, What seekest thou?

And it came to pass at that time, that Judah went down from his brethren, and turned in to a certain Adullamite, whose name was Hirah.

And Judah saw there a daughter of a certain Canaanite whose name was Shua. And he took her, and went in unto her.