The person who appears to have done the work of collecting this character (and others) for submission into the Unicode process back in 1997[0] (Barbara Beeton)

The person who appears to have done the work of collecting this character (and others) for submission into the Unicode process back in 1997[0] (Barbara Beeton) has actually responded to the StackExchange question[1]. Unfortunately even she is not aware of what the symbol is actually for. [0] https://www.ams.org/STIX/bnbranges.html https://www.ams.org/STIX/bnbranges.html [1] https://tex.stackexchange.com/a/640596 https://tex.stackexchange.com/a/640596