Chances are it is connected to the other personas and facebook has a more complete than you think profile, heck they don't even need you to be registered to hav

Chances are it is connected to the other personas and facebook has a more complete than you think profile, heck they don't even need you to be registered to have a profile on you, from being in registered people's addressbook to going to web page featuring a facebook button they can piece together a profile.