In the six years I've been working I think I've only been asked once what my real name is.
I think if you use an unusual working name they think it is made up (which it is) but if you use a 'believable' working name they don't bother. I've got to be honest and say I
when a guy says his name is John, Paul, Stephen, Dave ....................
My surname too is too unusual to let anyone know it.
I had an old BF who used to call me by the nickname of 'pussycat' ................ used to drive me insane.
I've got a handle and I prefer people who know it to use it.