I know that the men that were numbered still have their given name, but what...
Numbers 3:14 - 16
14 Then the LORD spoke to Moses in the wilderness of Sinai, saying. 15 "Number the sons of Levi by their fathers' households, by their families; every male from a month old and upward you shall number."
15 You shall observe the Feast of Unleavened Bread; for seven days you are to eat unleavened bread, as I commanded you, at the appointed time in the month Abib, for in it you came out of Egypt And none shall appear before Me empty-handed.
Sometimes it is hard to tell the difference.