These are the names of the sons of Levi according to their generations: Gershon, Kohath, and Merari, the years of the life of Levi being 137 years.
16. And these are the names of the sons of Levi. Because it was especially desirable to know the origin of Moses and Aaron, he refers to it at greater length, and more distinctly enmnerates the families which descended from the patriarch Levi; not to attribute any peculiar dignity to his own race, but to make it appear more dearly that the people was not...
This genealogy ends in Moses and Aaron to prove they were true Israelites, bone of their bone, raised up from among their own people, just as Christ would be. God's favours do not follow the order of birth; He often prefers the younger before the elder, crossing hands according to His sovereign will, not man's expectation.
AI summary
Commenting on Exodus 6:14-30
And the sons of Gershom, Libni, and Shimi, according to their families. He had only two sons, from whom came the families of the Libnites and Shimites; see Num 3:21. . Exodus 6:18 exo 6:18 exo 6:18 exo 6:18And the sons of Kohath, Amram, and Izhar, and Hebron, and Uzziel,.... So they are reckoned in Ch1 6:18 though only the family of the Hebronites are mentioned in Num 26:58.