Numbers 4:1

Aaron : a son of Amram; brother of Moses,son of Amram (Kohath Levi); patriarch of Israel's priests,the clan or priestly line founded by Aaron

Moses : a son of Amram; the Levite who led Israel out of Egypt and gave them The Law of Moses,a Levite who led Israel out of Egypt and gave them the law

Numbers 4:21

Moses : a son of Amram; the Levite who led Israel out of Egypt and gave them The Law of Moses,a Levite who led Israel out of Egypt and gave them the law