'Chamberlain' in the Bible

And the Midianites sold him into Egypt, to Potiphar, a chamberlain of Pharaoh, the captain of the life-guard.

And Joseph was brought down to Egypt; and Potiphar, a chamberlain of Pharaoh, the captain of the life-guard, an Egyptian, bought him of the hand of the Ishmaelites who had brought him down thither.