Pseudonyms
Pseudonyms can be used by artists (Künstlername, "artist's name") and members of religious orders (Ordensname); If a pseudonym is widely known in public it can be added to the passport of that person (under the weaker legal status of Künstlername) and be used instead of the original name in most situations. The same field in the passport also serves to show religious names, i.e. the new name somebody takes on when becoming a monk or nun.
Read more about this topic: German Name