...seriously, who writes these things? This is the Internet -- don't most people have a plethora of names?
Or does my sample group have a peculiar bias?
Here's a variation: do you consider your LJ handle or other online noms de guerre to be "names", or just "handles"?
"Athelind" is most definitely another "name" for me. I'm well-known online as "Athelind" or "Your Obedient Serpent" -- better known by far than I am by my legal name. A number of my friends and acquaintances call me "Athe" even in face-to-face conversations.
Hell, some people I know on Second Life call me "Athelind" even when I'm logged in under yet another name.