When I was in my first job in the late 80's / early 90's there was a young woman in our office who'd officially changed her name from something like Alison Smith to Boris Karloff.....
I also have a friend whom I and others have always known as Michael, but when we meet up with another group of...
Good on you.
I was supposed to be an Edward after my late uncle Teddy, but my mum changed that and called me Kevin! In fairness it was the only thing she ever did that hurt me, and I forgave her by the time I turned 35.