The sons of Shobal: Alian, Manahath, Ebal, Shephi, and Onam. The sons of Zibeon: Aiah and Anah.

The sons of Judah: Er, Onan, and Shelah. These three were born him of the daughter of Shua the Cananitess. But Er the eldest the son of Judah was evil in the sight of the LORD, and therefore he slew him.

And Jerahmeel had yet another wife named Atarah which was the mother of Onam.

The sons of Onam were: Shammai and Jada. The sons of Shammai: Nadab and Abishur.