'Boy' in the Bible

"There is a boy here who has five barley loaves and two fish, but what are these among so many?"

Moses has given you circumcision (not that it is of Moses, but of the fathers), and on the Sabbath you circumcise a boy.

If a boy receives circumcision on the Sabbath, that the law of Moses may not be broken, are you angry with me, because I made a man completely healthy on the Sabbath?