Re: Mylee, Kodie, Skylar and Ebony.
No, they really don't sound like siblings. Mylee (I'd spell it Maile) is Hawaiian, or at the least Asian sounding. Kodie is a sickly-cutesy spelling of a sickly-cutesy name that I consider a boy's name. Skylar is so unisex I can't see it on either one, boy or girl. I can sort of see Cody and Skylar as a sibset, but I wouldn't be able to say which was a girl and which a boy.
Ebony is *very* black, in my opinion. You rarely ever see it on a white girl in the US, and when you do it always seems affected or forced, like this black guy I knew called Ivory.