Yes it is. Specifically BJ Navara (with one space, capitalised as shown) is available.
I am fairly sure I can change it to that and NOT affect your password (meaning that your password will remain the same). I did this for someone last night and they haven't logged back on since, so I'm hoping that's just their usage pattern.
If you want to proceed, let me know then log off - wait for 5 minutes and try logging on with the NEW user name and your CURRENT password. When you get back on, send me a PM to confirm that you're on. If I do NOT get a message from you, I will reset your password and send an email to the address that you registered with - sound ok?