Numbers 3:19, 27

And the sons of Kohath by their families; Amram, and Izehar, Hebron, and Uzziel.

And of Kohath was the family of the Amramites, and the family of the Izeharites, and the family of the Hebronites, and the family of the Uzzielites: these are the families of the Kohathites.