John Gill Commentary Numbers 3:24

"And the prince of the fathers` house of the Gershonites shall be Eliasaph the son of Lael." — Numbers 3:24 (ASV)

And the chief of the house of the fathers of the Gershonites, &c.] Who had the chief authority over them, and the chief direction of them in what they were to do: [shall be] Eliasaph the son of Lael; but who he was, or of which family of the Gershonites, whether of the Libnites or Shimites, is not said here or elsewhere; nor do the Jewish writers, who affect to know every thing, pretend to tell us.