Numbers 3:19 ASV

¹⁷  And these were the sons of Levi by their names: Gershon, and Kohath, and Merari.

¹⁸  And these are the names of the sons of Gershon by their families: Libni and Shimei.

¹⁹  And the sons of Kohath by their families: Amram, and Izhar, Hebron, and Uzziel.

²⁰  And the sons of Merari by their families: Mahli and Mushi. These are the families of the Levites according to their fathers' houses.

²¹  Of Gershon was the family of the Libnites, and the family of the Shimeites: these are the families of the Gershonites.