These are the names of the sons of Aaron: Nadab, the firstborn, and Abihu, Eleazar, and Ithamar.

And to Aaron were born Nadab and Abihu, Eleazar and Ithamar.

from the descendants of Phinehas, Gershom; from the descendants of Ithamar, Daniel; from the descendants of David, Hattush

The children of Amram: Aaron, Moses, and Miriam. The sons of Aaron: Nadab, Abihu, Eleazar, and Ithamar.

Nadab and Abihu died before their father did; they had no sons. Eleazar and Ithamar served as priests.

The descendants of Eleazar had more leaders than the descendants of Ithamar, so they divided them up accordingly; the descendants of Eleazar had sixteen leaders, while the descendants of Ithamar had eight. ¹ 

Aaron married Elisheba, the daughter of Amminadab and sister of Nahshon, and she bore him Nadab and Abihu, Eleazar and Ithamar.

This is the inventory ¹  of the tabernacle, the tabernacle of the testimony, which was counted ²  by the order ³  of Moses, being the work ⁴  of the Levites under the direction ⁵  of Ithamar, son of Aaron the priest.

This is the service of the families of the Gershonites concerning the tent of meeting. Their responsibilities will be under the authority ¹  of Ithamar son of Aaron the priest. ² 

This is the service of the families of the Merarites, their entire service concerning the tent of meeting, under the authority of Ithamar son of Aaron the priest.”

and he gave four carts and eight oxen to the Merarites, as their service required, under the authority ¹  of Ithamar son of Aaron the priest.

The divisions of Aaron’s descendants were as follows: The sons of Aaron: Nadab, Abihu, Eleazar, and Ithamar.

David, Zadok (a descendant of Eleazar), and Ahimelech (a descendant of Ithamar) divided them into groups to carry out their assigned responsibilities. ¹ 

They divided them by lots, for there were officials of the holy place and officials designated by God among the descendants of both Eleazar and Ithamar. ¹ 

¹ “And you, bring near ²  to you your brother Aaron and his sons with him from among the Israelites, so that they may minister as my priests ³  – Aaron, Nadab and Abihu, Eleazar and Ithamar, Aaron’s sons.

Then Moses spoke to Aaron and to Eleazar and Ithamar, his remaining sons, “Take the grain offering which remains from the gifts of the Lord and eat it unleavened beside the altar, for it is most holy.

Later Moses sought diligently for the sin offering male goat, ¹  but it had actually been burnt. ²  So he became angry at Eleazar and Ithamar, Aaron’s remaining sons, saying,

Nadab and Abihu died ¹  before the Lord ²  when they offered ³  strange ⁴  fire ⁵  before the Lord in the wilderness of Sinai, and they had no children. ⁶  So Eleazar and Ithamar ministered as priests ⁷  in the presence of ⁸  Aaron their father.

The scribe Shemaiah son of Nethanel, a Levite, wrote down their names before the king, the officials, Zadok the priest, Ahimelech son of Abiathar, and the leaders of the priestly and Levite families. One family was drawn by lot from Eleazar, and then the next from Ithamar. ¹ 

Then Moses said to Aaron and to Eleazar and Ithamar his other two sons, “Do not ¹  dishevel the hair of your heads ²  and do not tear your garments, so that you do not die and so that wrath does not come on the whole congregation. Your brothers, all the house of Israel, are to mourn the burning which the Lord has caused, ³