Ochlonym is a fairly recent coinage, alleged to me "mob name" or pseudonym used by a criminal.
The earliest use of a fictitious name I can think of is Odysseus telling the Cyclops his name was
"Nemo". So authors have noms de plume, warriors noms de querre, radio amateurs "handles"
CB'ers ditto. Just the other day, I was instructed to provide a "screen name" for a new e-mail
account. I prefer to use my own name, but had to add some numbers.
But crooks want to make it harder for cops to identify them, ao the use aliases, and now
oschlonyms, if they yet know the word.