[quote:18ac4ce438="Marcia"][quote:18ac4ce438="jarmara"]ang-(to rhyme with hang)-you-ah is how I've always assumed it.[/quote:18ac4ce438]

I believe that Pratchett actually said that is the correct way. However, in my head I always say "Ang-wa" is in "anguish".[/quote:18ac4ce438]
Yes, he clarified it. I think there's a difference between how u sounds are treated in American and British English. It is ANG-gyoo-ah.