Slavithia sounds like a terrible name for a fine girl. I seen this several times. One girl named Yahaira ugly name, but DAM she fine.
Since the OP says they both look exactly alike I voted for Alisandra. I can call her lisa buttah If I had no idea how either one looked I would go with Slavithia. On the gamble that she would be one of the many girls I've meet who have a lousy name but are very attractive.
( + )
Hmm, that's a good one.
What about Syphilis? That's just Phylis with two extra letters. :)
Hehe! Anytime buddy. =D Though on a serious note she is one of my favorites. XD