Considering my user name IS my name, just translated... all I would be changing is my middle name from Michelle to Marie. No big deal - I wouldn't have picked it if I didn't like the sound of it. And I've been "Rif" or "Riffie" to my friends for at least 10 years. I would honestly like myself better as Rifka than Rebecca.
And! Because there are now THREE of us at my office, and I am ALWAYS getting the other two's calls, if I could say my name was Rifka, there would no longer be an issue!
And it would be so. Fricken. Cool.