Numbers 3:17 YLT

¹⁵  'Number the sons of Levi by the house of their fathers, by their families; every male from a son of a month and upward thou dost number them.'

¹⁶  And Moses numbereth them according to the command of Jehovah, as he hath been commanded.

¹⁷  And these are 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, 'are' Amram and Izhar, Hebron and Uzziel.