It's short, it's easy to pronounce (except for some kids, it seems) and a lot of people yell it when I'm on to my antics again.
Face it, it's easier to remember than Rekonagntor023681.z... Easier to yell, too.
Names are ignored in Warcraft 3, they just call you by the current colour you're in. It took a while that there was a name for Teal. I didn't knew who that dumbass was, he did everything wrong... oh, me? Oops!