1 Chronicles 2:27

2:26 Jerahmeel had another wife, whose name was Atarah; she was the mother of Onam.

2:27 The sons of Ram, the firstborn of Jerahmeel, were Maaz, Jamin, and Eker.

2:28 The sons of Onam were Shammai and Jada. The sons of Shammai were Nadab and Abishur.