Read this passage and open each verse for the full verse feed and commentary tools.
17And these were the sons of Levi by their names: Gershon and Kohath and Merar'i. 18And these are the names of the sons of Gershon by their families: Libni and Shim'e-i. 19And the sons of Kohath by their families: Amram, Izhar, Hebron, and Uz'ziel. 20And the sons of Merar'i by their families: Mahli and Mushi. These are the families of the Levites, by their fathers' houses.
Numbers 3:17-20 (RSV)