I am adopted and my adoptive parents abandoned my given name and called me Nikola, for heaven's sake.
I got teachers saying 'are you sure it's got a K and not a C?'. I would say 'with a K, as in Tesla', which didn't endear me to the teachers. One said 'well, I am going to spell it with a C'. I said, 'spell it how you like. If you don't have respect for the spelling of my name, I shan't bother having respect for your name Mrs Green' (Her name was Mrs Brown). Half an hour outside the headmaster's office that day.
I didn't do too badly with the stupid name. I have a couple of degrees, bunch of A levels, more O levels and an HND (plus a couple of C&Gs as well). I did change my name when I was 18, right back to my 'proper' name. Maybe that's why I did better post Grammar education then during though. Who knows.