Exodus 6:20 (KJV)

And the sons of Simeon; Jemuel, and Jamin, and Ohad, and Jachin, and Zohar, and Shaul the son of a Canaanitish woman: these are the families of Simeon.

And these are the names of the sons of Levi according to their generations; Gershon, and Kohath, and Merari: and the years of the life of Levi were an hundred thirty and seven years.

The sons of Gershon; Libni, and Shimi, according to their families.

And the sons of Kohath; Amram, and Izhar, and Hebron, and Uzziel: and the years of the life of Kohath were an hundred thirty and three years.

And the sons of Merari; Mahali and Mushi: these are the families of Levi according to their generations.

And the sons of Izhar; Korah, and Nepheg, and Zichri.

And the sons of Uzziel; Mishael, and Elzaphan, and Zithri.

And Aaron took him Elisheba, daughter of Amminadab, sister of Naashon, to wife; and she bare him Nadab, and Abihu, Eleazar, and Ithamar.

And the sons of Korah; Assir, and Elkanah, and Abiasaph: these are the families of the Korhites.

And Eleazar Aaron's son took him one of the daughters of Putiel to wife; and she bare him Phinehas: these are the heads of the fathers of the Levites according to their families.