Definitely Indiana Mae - it just flows so well, it was literally jumping of the screen at me. I wouldn't worry about Mae not going so well with Sayle- you are hardly likely to call your daughter by her last name anyway. You might call her 'Indiana Mae', and at school etc, when she is called they will not use her middle name- it will just be 'Indiana Sayle' - so Mae and Sayle will hardly be used together. Therefore I wouldn't worry about that at all. I think its gorgeous and unique.