An-gwa for me, too.
I always associate this name with "anguish" and you do pronounce that an-gwish, no (I'm not sure since I'm not a native speaker)?
Never was too sure about Astfgl myself.
On with their heads! I'm the clown prince of fools if you don't get the joke it's your loss Love and laughter you see are the new currency 'cause greed's coinage is not worth a toss
It's An-gwa for me as well. I tend to work on the basis that Stephen Briggs pronunciations are probably correct as Terry would probably correct him pretty quickly if it wasn't how he intended it.