[jfk13]

The formal name of the Unicode character U+0040 '@' is, in fact, COMMERCIAL AT.

https://en.wikipedia.org/wiki/At_sign#Unicode

[Sanzig]

It's also the "a commercial" in Quebec French [1]. Despite lacking the accent on the A (à), the intention of the A is to stand in for the single letter French word "à" (at) [2].

[1] https://vitrinelinguistique.oqlf.gouv.qc.ca/fiche-gdt/fiche/... [2] https://www.noslangues-ourlanguages.gc.ca/fr/cles-de-la-reda...