4 ms·

I've definitely heard it referred to as "ampersat" though from OP sounds like it ought to be "atpersat." The other name I'm familiar with is "Commercial At."

• masswerk 4y ago
  "Commercial At" is a thing in German, too (translating the "at", Kaufmannsund.) However, it refers to only one of the common uses. The most prominent use has been in lists, like, "3 socks @ 2 denarii" (meaning, three socks at 2 denarii each), &c… BTW, speaking of lists, there's another, now lost ligature for "i"+"t", often used as an abbreviation for "item", which works just the same, an open circle denoting the "t".