Charles Ellicott Commentary 1 Chronicles 2:5

"The sons of Perez: Hezron, and Hamul." — 1 Chronicles 2:5 (ASV)

The sons of Pharez. —From Genesis 46:12, which also names the five sons of Judah. Numbers 26:21 mentions the clans (mishpahath) of the Hezronites and Hamulites, as registered in a census held by Moses.