No no, it's far too late to change the names now. That'd be a breach of continuity. Like when they changed the actress who played Becky after a few seasons in Roseanne. I don't know if Roseanne was exported to Sweden, but trust me when I say the reference I just made is both appropriate and hilarious.
You know, I suspected they might be pseudonyms, but you used them so consistently I started to think that was just what they went by.