Aaron: Children of
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Exodus 6:23, 25
And Aaron married Elisheba, the daughter of Amminadab and sister of Nahshon, and she bore him Nadab and Abihu, Eleazar and Ithamar. / Aaron’s son Eleazar married one of the daughters of Putiel, and she bore him Phinehas. These were the heads of the Levite families by their clans.
1 Chronicles 6:3
The children of Amram: Aaron, Moses, and Miriam. The sons of Aaron: Nadab, Abihu, Eleazar, and Ithamar.
1 Chronicles 24:1, 2
These were the divisions of the descendants of Aaron. The sons of Aaron were Nadab, Abihu, Eleazar, and Ithamar. / But Nadab and Abihu died before their father did, and they had no sons; so Eleazar and Ithamar served as priests.