Share 'Change log-in ID for nXtRender site?'

In the wake of the Adobe break-in, I am updating a lot of passwords, and would like to standardize as much as possible on one log-in ID from site to site. At the moment, I am using about a dozen variants on my name, and can never remember which one to use. Is it possible to keep my display name as Bill Gilliss (so my fan base will not get confused), but use something else as a log-in ID? Thanks.