It totally depends on the build of the forum's program. For example, I am a member on another forum and the software they use allow you to change your "display" username by just going into the profile settings. Your log in name always remains the same, but everything else can be changed. So, I thought this might be the same way. But, I guess not. I guess everyone will just have to live in a state of confusion.
Why change your name? If you know who you are, be happy with that name. If the names are close enough you may even be related.
I found four (4) "indian" names in the member list 1. indianhead....me, of course 2. Indianhead1990 3. IndianheadJim 4. INDIAN_MANIAC I wonder where those guys are...?