Long answer: Most DBs key on lastname, so MegaZone is my last name, officially, and I have no first name. Then I leave the first name blank if it'll let me, but more often I need to put something in there - so these days I use 'MZ' as that's what I have people call me. I used to use 'Mr', and I still need to use that on some government forms so everything will match up.