Arcana Coelestia # 478
478. The reason he is called Adam is that the Hebrew word Adam means man. But the fact that Adam was never used as a proper name, only Man, is quite clear from the consideration that both here and earlier he is spoken of in the plural and not in the singular, and that the term refers to both man and woman. The two together are called Man. Anyone may see from these words that both are included, for it is said, 'He called their name Man on the day in which they were created', and similarly in 1:26, 28, 'Let Us make man in Our image, and they will have dominion over the fish of the sea. This shows also that the subject is not about someone who, when created, was the first human being of all, but about the Most Ancient Church.
Leviticus 8:10-12
10
Moses took the anointing oil, and anointed the tabernacle and all that was in it, and sanctified them.
11
He sprinkled it on the altar seven times, and anointed the altar and all its vessels, and the basin and its base, to sanctify them.
12
He poured some of the anointing oil on Aaron's head, and anointed him, to sanctify him.