"Now the LORD spoke to Moses and Aaron
Hanoch and Pallu, Hezron and Carmi.
The sons of Uzziel were Mishael, Elzaphan and Sithri.
Aaron married Elisheba, daughter of Amminadab and sister of Nahshon,
and she bore him Nadab and Abihu, Eleazar and Ithamar.
The sons of Korah were Assir, Elkanah and Abiasaph.
These were the Korahite clans.
Eleazar son of Aaron married one of the daughters of Putiel,
and she bore him Phineas.
These were the heads of the Levite families, clan by clan.
It was this same Aaron and Moses to whom the LORD said,
'Bring the Israelites out of Egypt by their divisions.'
They were the ones who spoke to Pharaoh king of Egypt
about bringing the Israelites out of Egypt.
It was the same Moses and Aaron."
Exodus 6:1-27 (NIV)
Some further information is given on Aaron as well.