[Sundae]

My surname isn't impossible.
But it seems hard for people to hear/ read/ get their head round.

Given my first name begins with C, I am often called Connelly, because people can't grasp a surname that begins with an O. Either that or I go to collect something and find my name has been registered as starting with an A, despite the fact I always spell it out.

And my maiden name was Robinson!
So easy.
But as I think I've said before, I'd use the NATO call sign when giving a first initial over the phone.
Getting post (mail) addressed to Charlie Robinson was confusing, because he was my Uncle.