In real life I always introduce myself as "Ant", Brits tend to always want it to be "Andy", Europeans tend to get it right after questioning it and Americans can't seem to get their head around it "Err... Ant?" "Yes, Ant, A-N-T" "So, your name is Ant?" "YES!".
In WoW, my name is Lial or Léal, to which my European guild-mates delight in mispronouncing as "Lyle", and once caused a massive "ARRRRRRRGH, LEE AL, LEE AL, LEEEEEEEEE AALLLLLLLLL" on Vent.
On XBox Live, my tag is Ferrious. Which to Americans is ALWAYS "Ferrous". I am not an iron alloy, nor am I magnetic.