The sons of Pharez were Hezron, &c.— As Pharez could not be above ten years old when Jacob went into AEgypt, I approve of St. Augustine's interpretation of the words came into AEgypt, Genesis 46:8 which he supposes to include the whole time that Jacob lived in AEgypt, which was seventeen years; during which time Pharez may well be supposed to have had these two sons.
Related Commentaries of Genesis 46:12
Genesis 46:12
12 And the sons of Judah; Er, and Onan, and Shelah, and Pharez, and Zerah: but Er and Onan died in the land of Canaan. And the sons of Pharez were Hezron and Hamul.