'Keeper' in the Bible

And she again bare his brother Abel. And Abel was a keeper of sheep, but Cain was a tiller of the ground.

And the LORD said unto Cain, Where is Abel thy brother? And he said, I know not: Am I my brother's keeper?

But the LORD was with Joseph, and shewed him mercy, and gave him favour in the sight of the keeper of the prison.

And the keeper of the prison committed to Joseph's hand all the prisoners that were in the prison; and whatsoever they did there, he was the doer of it.

The keeper of the prison looked not to any thing that was under his hand; because the LORD was with him, and that which he did, the LORD made it to prosper.