It doesn't help that they change around the phoenetics for the English releases. Heck, Rikku's name was spelled Ryukku in Japanese, and it was clearly pronounced "REE-koo" in the game, which completely defies any and all rules of English. By all logic it SHOULD be pronounced "Rick-koo". But beyond that names do change from Japanese to English. Sabin, Amarant, Edward, Terra, Gareth, do any of these names sound familiar? They wouldn't to the Japanese. It's a frustrating affair trying to figure out what the names are actually supposed to be.

However, Tidus's name is properly pronounced "Tee-dus"