While the name Agnes sounds nice in Scandinavian countries, I can't stand this name at all. It's hideous, sounds very dated, and reminds me of Abba (bleurgh!).
Despite having loved ABBA for some time, I'm still not sure on the pronunciation.
On ABBA In Japan, Agnetha Faltskög gave the pronunciation of her name, then said you can say Añeta (ann-YET-a) or Anna. The only trouble is, Añeta and the pronunciation she gave sounded the same to me!