Squall- pretty easy
Zell- Pretty easy
Quistis- Kwis-tiss
Selphie- Sell-Fie
Irvine- Ir-veen
Rinoa-Ry-no-a
Edea-E-dah

Also, most of the GF's are named for gods from ancient mythology. For example: Odin is Norse, Quetzecotl is for the Aztecs (pronounced Ket-ze-cot-el (or something like that)), Shiva I believe is Hindu, etc, etc. The ones who aren't named from mythology are pretty simple, like Brothers or Cactuar.