How did you choose your RS name?

If you're into Ancient History and studied about the Romans, I chose my name as remembrance of Legio IX Hispana (Ninth Legion). In the Roman Army, a Legion consisted of 5000 soldiers and Legio IX Hispana mysteriously disappeared in Britain around 117 CE, later to believed to have been massacred by British tribes at the time. Roman Senators tried to cover up their disappearance, as to not lower moral back in Rome for their efforts in invading and expanding in Britain.