Moniker
noun
A personal name or nickname; an informal label, often drawing attention to a particular attribute.
“The rookie was upset at being called Lemon Drop until she realized that everyone on the team had a silly moniker.”
A signature.
An object (structured item of data) used to associate the name of an object with its location.
Synonyms: byname, nickname, pseudonym, sobriquet, street name, to-name, tag