Of Hezron... — Judah had five sons, but inasmuch as Er and Onan died childless, Hezron and Hamul were substituted in their place. (Comp. Genesis 46:12.)
Related Commentaries of Numbers 26:21
Numbers 26:21
21 And the sons of Pharez were; of Hezron, the family of the Hezronites: of Hamul, the family of the Hamulites.