(But Er and Onan died in the land of Canaan): see 38.7 and 10.
Hezron and Hamul are the grandsons of Judah and the only great-grandsons of Leah and Jacob mentioned in this list.
Quoted with permission from Reyburn, William D. and Fry, Euan McG. A Handbook on Genesis. (UBS Helps for Translators). New York: UBS, 1997. For this and other handbooks for translators see here .