Numbers 3:18, 21, 24

These are the names of the sons of Gershon by their families: Libni and Shimei

Of Gershon was the family of the Libnites and the family of the Shimeites; these were the families of the Gershonites.

and the leader of the fathers’ households of the Gershonites was Eliasaph the son of Lael.