My Twitter name is a shorter version of my first name ("Zach" instead of "Zachary") and my last name (and no, it's not "Norn"). I've seen a lot of people do that.
Not like I use Twitter, though. I spent a combined total of 30 minutes on it. So take what I say with a grain of salt, I guess >_>
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Zachnorn - <D
http://board8.wikia.com - Board 8 Wiki | http://www.stickam.com/profile/zachnorn - Game broadcasts