וְאֵ֛לֶּה שְׁמ֥וֹת בְּֽנֵי־אַהֲרֹ֖ן הַבְּכ֣וֹר ׀ נָדָ֑ב וַאֲבִיה֕וּא אֶלְעָזָ֖ר וְאִיתָמָֽר׃
亞倫的兒子們名字如下：長子拿答，還有亞比戶、以利亞撒和以他瑪。
Sforno
ואלה שמות בני אהרן; each one of them was mentioned by his name, i.e. not only because he was a son of an illustrious father such as Aaron.
Rav Hirsch
V. 2. Eigentümlich ist die Akzentuierung. Es ist, als ob der Bericht mit schmerzlicher Pause zuerst auf Nadab und dann auf Abihu ruht und dann rasch Elasar und Itamar beifügt.
Kitzur Ba'al HaTurim
These are the names of the sons of Aharon, the firstborn, Nadav, and Avihu, Elazar and Isamar. There is a pause between the words “the firstborn” and “Nadav” because it does not refer to Nadav who died without children, and there is no practical ramification of his being the firstborn. Rather, it refers to Aharon who was the firstborn ahead of Moshe.