The following are the heads of their respective clans.
The sons of Reuben, Israel's first-born: Enoch and Pallu, Hezron and Carmi; those are the families of Reuben. The sons of Simeon: Jemuel, Jamin, Ohad, Jachin, Zohar, and Saul the son of a Canaanite woman; those are the families of Simeon. These are the names of Levi's sons by their lineage: Gershon, Kohath, and Merari; and the span of Levi's life was 137 years. The sons of Gershon: Libni and Shimei, by their families. The sons of Kohath: Amram, Izhar, Hebron, and Uzziel; and the span of Kohath's life was 133 years. The sons of Merari: Mahli and Mushi. These are the families of the Levites by their lineage.
Amram took to wife his father's sister Jochebed, and she bore him Aaron and Moses; and the span of Amram's life was 137 years. The sons of Izhar: Korah, Nepheg, and Zichri. The sons of Uzziel: Mishael, Elzaphan, and Sithri. Aaron took to wife Elisheba, daughter of Amminadab and sister of Nahshon, and she bore him Nadab and Abihu, Eleazar and Ithamar. The sons of Korah: Assir, Elkanah, and Abiasaph. Those are the families of the Korahites. And Aaron's son Eleazar took to wife one of Putiel's daughters, and she bore him Phinehas. Those are the heads of the fathers' houses of the Levites by their families.
It is the same Aaron and Moses to whom the Lord said, "Bring forth the Israelites from the land of Egypt, troop by troop." It was they who spoke to Pharaoh king of Egypt to free the Israelites from the Egyptians; these are the same Moses and Aaron. For when the Lord spoke to Moses in the land of Egypt...