Of course, there are tons of disputed phonetic pronounciations of names throughout the series, so I'm just wondering how you say some of them. Feel free to add your own.

Sephiroth:
Seff-ih-roth

Aeris:
Air-iss

Cait Sith:
Kate Sith

Yuffie:
Yuff-ee

Rinoa:
Rinn-oh-ah

Seifer:
See-fur

Eiko:
Ee-ee-koe

Zidane:
Zidd-ane

Brahne:
Brawne

Eidolon:
Ee-doe-lonn

Tidus:
Tie-dus

Chocobo:
Choke-a-bow

Bahamut:
Baa-hah-mutt

... I'm sure there are more, now post!