וַיִּהְי֣וּ בְנֵי־יְהוּדָה֮ לְמִשְׁפְּחֹתָם֒ לְשֵׁלָ֗ה מִשְׁפַּ֙חַת֙ הַשֵּׁ֣לָנִ֔י לְפֶ֕רֶץ מִשְׁפַּ֖חַת הַפַּרְצִ֑י לְזֶ֕רַח מִשְׁפַּ֖חַת הַזַּרְחִֽי׃
Chizkuni
לפרץ, the sons of Peretz were divided into three families; one bore the name of its founder, and the other two were Chetzron and Chamul.