Charles Ellicott Commentary 1 Chronicles 23:17

"And the sons of Eliezer were: Rehabiah the chief; and Eliezer had no other sons; but the sons of Rehabiah were very many." — 1 Chronicles 23:17 (ASV)

And the sons of Eliezer were, Rehabiah the chief. —The word “were” (became) should not be in italics in the text, as it is expressed in the Hebrew.

The chief (head) means founder and eponym of the clan of the sons of Rehabiah.

And Eliezer had none other sons. —Literally, And Eliezer had no other sons, and the sons of Rehabiah had multiplied exceedingly (unto height, 1 Chronicles 22:5). The clan Rehabiah was very populous.

Thus (1 Chronicles 23:16–17) the descendants of Moses consisted of two father-houses, or clans, namely, Shebuel and Rehabiah.