>>111794863legally your real name is whatever your legal name is
it's not different just because someone intended for you to be called something else and you got renamed at adoption, your name is your name
aside from legal names, your name is whatever people call you: if people call you Arthur, your name is Arthur because that's how you're known and what you respond to: you'd have to be pretty psychotic to not understand or accept that, and absolutely out of your cunting mind to think it's OK to just have a secret name that nobody uses
