וַיִּהְי֣וּ בְנֵי־פֶ֔רֶץ לְחֶצְרֹ֕ן מִשְׁפַּ֖חַת הַֽחֶצְרֹנִ֑י לְחָמ֕וּל מִשְׁפַּ֖חַת הֶחָמוּלִֽי׃
And the sons of Perez were: of Hezron, the family of the Hezronites; of Hamul, the family of the Hamulites.
Read commentary on Numbers 26:21, verse-by-verse classical interpretation.