'Certain' in the Bible

But there were certain of the scribes seated there, and reasoning in their hearts,

And there came together to him the Pharisees and certain of the scribes who had come from Jerusalem,

Because he was not certain what to say, for they were in great fear.

Then they sent to him certain of the Pharisees and the Herodians, so that they might make use of his words to take him by a trick.

And when they had come, they said to him, Master, we are certain that you are true, and have no fear of anyone: you have no respect for a man's position, but you are teaching the true way of God: Is it right to give taxes to Caesar or not?

Even so, when you see these things taking place, you may be certain that he is near, even at the doors.

Take care, keep watch with prayer: for you are not certain when the time will be.

So you are to keep watch: because you are not certain when the master of the house is coming, in the evening, or in the middle of the night, or at the cock's cry, or in the morning;

But a certain one of those who were near took out his sword, and gave the servant of the high priest a blow, cutting off his ear.

And a certain young man went after him, with only a linen cloth about his body; and they put their hands on him;