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.
Targum Jonathan on Numbers
The sons of Pherez, of Hezron, the family of Hezron; of Amul the family of Amul.