Leviticus 8

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

Thummim : a system (or device) to obtain divine guidance (IBD)

Urim : a device to discern divine guidance, used with the "Thummim"