I do like
Hayley and this is my favorite spelling. I've met two Haleys and one
Hailey. But this is over years and not all from one area so I don't see it as common. I'd want to spell it
Hayley right away but I'd probably ask or spell it
Haley first. I think
Hayley is the orignial though. I like
Hayley better but I'm not sure why. It's close. I spell
Kaylee first as it is my favorite.
Kailey is okay.
Kayley and
Kaley look awkward to me.