I Chronicles 6:1, 16-17, 20

The sons of Levi were Gershon, Kohath, and Merari.

The sons of Levi were Gershon, Kohath, and Merari. These are the names of the sons of Gershon: Libni and Shimei.

Of Gershon were Libni his son, Jahath his son, Zimmah his son