Since I'm mentioned at the top of this thread as "having shared my etymology" I suppose I probably should... (My first comment involved a long lost trumpet, not etymology)
in reply to Name Space
My full name is 'Blake David Mills IV' so most of the handles I've had are some variation on: 'blakem', 'bmills', 'bdm', or 'biv' ("Blake IV" => 'biv').
I tend to associate bmills with work, since its been the login assigned to me at my past three jobs. 'blakem' is my favorite though. It was my login in college and lots of peers called me blakem both online and off. 'biv' is a short prefix I use sometimes when naming programs and such (e.g. bivnn.cgi) but is too common to use as a defining login name. I also use a scrawled biv when legal documents ask me to initialize something.