This is a catchall artist page for credits that are listed as 'Anonymous' on a release, when the identity of the author is left hidden or unidentified for some reason. 'Anonymous' (also often abbreviated to 'Anon' or 'Anon.') is sometimes used as a pseudonym for artists who don't wish to have their true identities in the open. Anonymous is typically used in classical music & folk to note a composition where the writer wasn't mentioned and is not known until today, often accompanied by a classical style period, a century or (approximate) date, a location (country, city, ...), or the source of the work (typically a book collecting songs or composition).
This is not a specific artist - see the other 'Anonymous' artist entries for individuals who use that as their Alias.