'Keeper' in the Bible

And when they had given them a great number of blows, they put them in prison, giving orders to the keeper of the prison to keep them safely:

And the keeper of the prison awaking out of his sleep, and seeing the prison doors open, he drew out his sword, and would have killed himself, supposing that the prisoners had been fled.

And the keeper of the prison told this saying to Paul, The magistrates have sent to let you go: now therefore depart, and go in peace.

When the city recorder had quieted the crowd, he said, "Men of Ephesus, who in the world doesn't know that this city of Ephesus is the keeper of the temple of the great Artemis and of the statue that fell down from heaven?