When I went to Jamaica for a friend's wedding years ago, the resort staff seemed unable to say my name, and always turned it into
Cleo Katrina. Multiple members of staff called me that - I don't know if they all misread it, or if it worked better in their accent that way, or what. Instead of constantly correcting them I just became
Cleo Katrina while I was there. I joked with my friends that she was my evil twin. So I guess that would be my alter-ego!
I actually love this idea - it's called "psychological Halloweenism". It's really useful in terms of giving yourself the creative space to do things differently because you're "not yourself".