It sort of depends on whether it's prn. Sa-blawna or Sa-blohna.
If it rhymes
Shawna then it's alright - it does sound placenamey and the right amount exotic. If it rhymes
Mona, then I'm having a problem with the sound of the word "blown" in it. I'd consider spelling it Sablonna just to be sure it was rhyming
Shawna.