I don't think I've ever met anyone named
Hallie although I used to know someone named
Haley (pronounced like
Hayley) who was called
Hallie by mistake. I think
Hallie is a nice name, but it seems like some people might confuse it with either
Hayley or
Holly. I'm not sure how often this would happen, but hopefully not too often. I'd stick with the spelling
Hallie. I don't care for the other spellings.