KJV: And Eleazar Aaron's son took him one of the daughters of Putiel to wife; and she bare him Phinehas: these are the heads of the fathers of the Levites according to their families.
NASB: Aaron's son Eleazar married one of the daughters of Putiel, and she bore him Phinehas. These are the heads of the fathers' households of the Levites according to their families.
KJV: And take thou unto thee Aaron thy brother, and his sons with him, from among the children of Israel, that he may minister unto me in the priest's office, even Aaron, Nadab and Abihu, Eleazar and Ithamar, Aaron's sons.
NASB: "Then bring near to yourself Aaron your brother, and his sons with him, from among the sons of Israel, to minister as priest to Me-- Aaron, Nadab and Abihu, Eleazar and Ithamar, Aaron's sons.
KJV: And Moses said unto Aaron, and unto Eleazar and unto Ithamar, his sons, Uncover not your heads, neither rend your clothes; lest ye die, and lest wrath come upon all the people: but let your brethren, the whole house of Israel, bewail the burning which the LORD hath kindled.
NASB: Then Moses said to Aaron and to his sons Eleazar and Ithamar, "Do not uncover your heads nor tear your clothes, so that you will not die and that He will not become wrathful against all the congregation. But your kinsmen, the whole house of Israel, shall bewail the burning which the LORD has brought about.
KJV: And Moses spake unto Aaron, and unto Eleazar and unto Ithamar, his sons that were left, Take the meat offering that remaineth of the offerings of the LORD made by fire, and eat it without leaven beside the altar: for it is most holy:
NASB: Then Moses spoke to Aaron, and to his surviving sons, Eleazar and Ithamar, "Take the grain offering that is left over from the LORD'S offerings by fire and eat it unleavened beside the altar, for it is most holy.