Years ago, when I was married, I used to play an online game that you had to have a screen name for, but also had live chat. I had a really hard time coming up with a screen name so my husband made one for me. There is a series of books about a dampyr (half-human, half-vampire) named Sonja Blue. (J-Dub got me hooked on them.) My hubby read them and thought that Sonja was just like me, so....he made my screen name Sonja Blue. I got so used to the ppl on the game calling me that I just went with it.
Fast forward, I started working at Sam's Club and so many ppl had trouble pronouncing my real name that I made a name-badge that had Sonja on it. Seeing how I have always HATED my real name cause most ppl don't say it right, it didn't bother me that ppl started calling me by it and I actually started introducing myself as Sonja.
Now I can tell who knows me from where by what they call me. Tit= school or friends from school, real-name= family, and Sonja=everywhere else. :)