3:14-39 The Levites were in three classes, according to the sons of Levi; Gershon, Kohath, and Merari; and these were subdivided into families. The posterity of Moses were not at all honoured or privileged, but stood upon the level with other Levites; thus it was plain, that Moses did not seek the advancement of his own family, or to secure any honours to it. The tribe of Levi was by much the least of all the tribes. God's chosen are but a little flock in comparison with the world.And the sons of Kohath, by their families,.... Who was the second son of Levi:

Amram, and Izehar, Hebron, and Uzziel; so in Exodus 6:18; and from whom were named the family of the Amramites, to which Moses and Aaron belonged; and the families of the Izeharites, Hebronites, and Uzzielites, as they are called, Numbers 3:27.