One. It sort of picked itself, I don't know why I'd change it 'cause it fits fine. Short, easy for me to sign, and my name-sign ended up based on it rather than on my birth name and I'd be loathe to loose that.
A legal name doesn't mean much to me, since most people are arbitrarily assigned them at birth and they relate in no way to their personalities; but rather, to the desires and tastes of the parents; or occasionally to honor or disrespect other family members. Kinda dumb, if you ask me.
I'd be just as happy with a masculinization of my birth name, but it was used as a nickname for years, and still is sometimes. It'd be weird to be called a name I'm referred to while in 'girl-mode' while in 'guy-mode'.