Numbers 3:19

3:19 The sons of Kohath by their families were: Amram, Izhar, Hebron, and Uzziel.

Numbers 16:1

The Rebellion of Korah

16:1 Now Korah son of Izhar, the son of Kohath, the son of Levi, and Dathan and Abiram, the sons of Eliab, and On son of Peleth, who were Reubenites, took men