Who are you going to be after the change? Can I recommend Karl Hungus or Gert Dankworth? Those are my go-to alter egos, but you can feel free to borrow them
I made the same request to JDOnTheGo last year. His reply was "Sorry, I cannot find a way to make such a change."
Maybe things have changed since then.
Dig your aliases, Tejon! They're very Ron-Burgunesque
Can't remember who did it, but somebody changed my profile name for me couple years ago. I may not have posted anything yet at that point... perhaps that's a sticking point?