Mine is my nickname that only a select few know/use. It's the translation of my maiden name in a different language.
I would actually prefer to change it, as I would not want my exDH googling to find me online. I was a little naive at the start as this was my first (and only) forum I participate in.
But it's taken me a year to be semi recognised, so don't want to go back to being anonymous on BH!