:: I've just checked it and now I'm pretty sure someone just made it up. The film goes to great lengths to conceal the barber's name: In the scene where the hospital authorities discuss his case they call him "Patient 33". His ID card is shown, and there it says (barely legible): "Name unknown - says he's a barber." The sign on his shop says "Barber" and something like "Razn", "Barbavadn", "Haru Tondador" which supposedly means something like "shaving and haircutting". 

 :: BTW, someone knowledgeable should check the claim that the signs are in Esperanto. They seem to be made up of bits and pieces of all kinds of languages to be vaguely understandable - just like Esperanto is made up, but I'm not sure it is Esperanto (I rather think not).