1 Chronicles 2:24-28

After the death of Hezron in Caleb-ephrathah, Abijah, Hezron’s wife, bore to him Ashhur the father of Tekoa.

Now the sons of Jerahmeel, the firstborn of Hezron, were Ram the firstborn, then Bunah, Oren, Ozem, and Ahijah.

Jerahmeel had another wife, whose name was Atarah; she was the mother of Onam.

The sons of Ram, the firstborn of Jerahmeel, were Maaz, Jamin, and Eker.

The sons of Onam were Shammai and Jada. And the sons of Shammai were Nadab and Abishur.