And these are the names
shem  (shame)
an appellation, as a mark or memorial of individuality; by implication honor, authority, character -- + base, (in-)fame(-ous), named(-d), renown, report.
of the sons
ben  (bane)
a son (as a builder of the family name), in the widest sense (of literal and figurative relationship, including grandson, subject, nation, quality or condition, etc.
of Aaron
'Aharown  (a-har-one')
Aharon, the brother of Moses -- Aaron.
Nadab  (naw-dawb')
liberal; Nadab, the name of four Israelites -- Nadab.
the firstborn
bkowr  (bek-ore')
firstborn; hence, chief -- eldest (son), firstborn(-ling).
and Abihu
'Abiyhuw'  (ab-ee-hoo')
father (i.e. worshipper) of Him (i.e. God); Abihu, a son of Aaron -- Abihu.
'El`azar  (el-aw-zawr')
God (is) helper; Elazar, the name of seven Israelites -- Eleazar.
and Ithamar
'Iythamar  (eeth-aw-mawr')
coast of the palm-tree; Ithamar, a son of Aaron -- Ithamar.