Ugh, apparently, from what I have been told, there is a 3D CGI child porn creator using this name which I started using years ago. Now that I found this out may I ask for a name change please? I don't want to be associated with such filth.
I think you can change your name by editing your profile. But I'm not certain about that. If you PM a mod I'm sure they'll help you change your username.
Don't change the name. There are a lot of designers who do it and you can always find a person who will take the same name as you. After all, you won't be changing the name every time. When I found out that some vendors from Daz and Renderosity are doing it, I stopped buying their products.