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.
Ezekiel 16:16-18
16
You took of your garments, and made for yourselves high places decked with various colors, and played the prostitute on them: [the like things] shall not come, neither shall it be [so].
17
You also took your beautiful jewels of my gold and of my silver, which I had given you, and made for yourself images of men, and played the prostitute with them;
18
and you took your embroidered garments, and covered them, and did set my oil and my incense before them.