The name is really only one syllable, with a first sound that's very hard for English-speakers to pronounce, sort of an AAA in the back of your throat, and the change between that sound and the OON that follows is what makes some people give it two syllables.  So it's sort of exactly the way it looks:  AAOUN.  Or maybe AOWN.  Or AAOON.  But that first sound is hard to describe in writing.