Tie-tee-ahn-uh
Probably so, although I wondered if the "tion" maybe was pronounced "shun" as in motion, which would make it sound like "Tie-shun-na". I don't dare say what my first pronounciation of it sounded like. LOL!
I thought that too, but under most linguistic pronunciations, a doubling of a vowel changes the preceding letters to harder pronunciations. Also, when the black community makes up names like this, they use the more common sh- when they want to make that sound as opposed to -tion, which is a grammatically educated sound construct. The study of Ebonics actually shows that the users of that dialect prefer simpler spelling and noun-verb constructions.