From the italian comic strip "Lupo Alberto" (Albert the wolf), as I like it, my name is Alberto, and two nickname of mine in real life and in some forums too are just Lupo Alberto, or simply Lupo.
In the past I even (unsuccessfully) courted a girl named Marta, but she's not a hen like Marta, Lupo Alberto's girlfriend in the comic  

My name is so awesome that my sister and I are currently fighting each other over custody of the Alasted® moniker.

My name fails pretty badly. On a whim, I wanted to name myself after the Tyrant from Resident Evil (codename T103) only I did the codename wrong. Wouldn't change it though - I think 'teeothirteen' has a nice ring to it.

Found it on the back of a milk carton.

I give this thread a 9.3.

Back in the Unreal Tournament/ Quake 3 days I used to play alot online with my brother ... Being that everyone else had names like "LeetKiller37" and "Seperoth49" he named himself FuzzyBunny and I went for HappySquirrel but misstyped my name and produced HappySqurriel (To this day, I don't know how I made such a mis-spelling)

My nickname is Joey. It is the scientific name for a baby kangaroo Joeykangaroo. 

No, I would never change it. 

When I started Final Fantasy XI, My brother came up with Tokoro for me, it means place :3 I've been using it ever since.

Who are you again? 

It's pronounced 'nuff said.

Mine is from a TP book and is the name of the king of the trolls.