Nadab, Abihu, Eleazar, and Ithamar were born to Aaron,
Cross References
Exodus 6:23And Aaron married Elisheba, the daughter of Amminadab and sister of Nahshon, and she bore him Nadab and Abihu, Eleazar and Ithamar.
Numbers 3:2These are the names of the sons of Aaron: Nadab the firstborn, then Abihu, Eleazar, and Ithamar.
Treasury of Scripture
And to Aaron was born Nadab, and Abihu, Eleazar, and Ithamar.
Numbers 3:4
And Nadab and Abihu died before the LORD, when they offered strange fire before the LORD, in the wilderness of Sinai, and they had no children: and Eleazar and Ithamar ministered in the priest's office in the sight of Aaron their father.
Leviticus 10:1,2
And Nadab and Abihu, the sons of Aaron, took either of them his censer, and put fire therein, and put incense thereon, and offered strange fire before the LORD, which he commanded them not…
1 Chronicles 24:1,2
Now these are the divisions of the sons of Aaron. The sons of Aaron; Nadab, and Abihu, Eleazar, and Ithamar…