Numbers 4:2

Take a census of the Levites who are descended from Kohath. List them by families and households.

Amram, Izhar, Hebron, and Uzziel were the sons of Kohath. Their families were named after them.

To Kohath belonged the families descended from Amram, Izhar, Hebron, and Uzziel. These were the families descended from Kohath.

Treasury of Scripture Knowledge did not add