Genesis 46:12

12. Hezron and Hamul The probable reason for reckoning these among the seventy (Genesis 46:27) was, that they were adopted by Judah in place of the deceased Er and Onan, who died in the land of Canaan. This appears from the fact that in the later registers (Numbers xxvi and 1 Chronicles ii) they appear as permanent heads of families in Judah. Heber and Malchiel, grandsons of Asher, (Genesis 46:17,) are also reckoned among the seventy, and probably for the reason that they were born before the migration into Egypt. They also appear in the later lists as heads of families in Israel.