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

But Nadab and Abihu died in the presence of the Lord when they offered strange (unholy, unacceptable, inappropriate) fire before the Lord in the Wilderness of Sinai; and they had no sons. So Eleazar and Ithamar served as priests in the presence and under the supervision of Aaron their father.

This is the service of the families of the sons of Gershon in the Tent of Meeting (tabernacle); and their duties shall be under the direction of Ithamar the son of Aaron, the [high] priest.

This is the work of the families of the sons of Merari, according to all their tasks in the Tent of Meeting (tabernacle), under the direction of Ithamar the son of Aaron, the priest.”

and he gave four carts and eight oxen to the sons of Merari, according to their service [in transporting the tabernacle], under the supervision of Ithamar the son of Aaron, the [high] priest.

To Aaron were born Nadab, Abihu, Eleazar, and Ithamar.