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

The sons of Nadab were Seled and Appaim, and Seled died without sons.

The children of Amram were Aaron, Moses and Miriam. And the sons of Aaron were Nadab, Abihu, Eleazar and Ithamar.

and his firstborn son was Abdon, then Zur, Kish, Baal, Nadab,

and his firstborn son was Abdon, then Zur, Kish, Baal, Ner, Nadab,

Now the divisions of the descendants of Aaron were these: the sons of Aaron were Nadab, Abihu, Eleazar and Ithamar.

But Nadab and Abihu died before their father and had no sons. So Eleazar and Ithamar served as priests.