Imamat 10:1-2

Abihu : son of Aaron the high priest

Harun : a son of Amram; brother of Moses,son of Amram (Kohath Levi); patriarch of Israel's priests,the clan or priestly line founded by Aaron

Nadab : son of Aaron,son and successor of King Jeroboam,son of Shammai of Judah,son of Jeiel of Benjamin