Surnames and physical appearances Help?

Okay, so I have a story in mnid, have all the character names chosen, but I am awful with physical descriptions of characters. So I was hoping somebody could help me out with what they think these character names should look like. And also give surnames.

Blake: Just need a surname that has something to with light and dark.

Micah: Surname, so long as it goes well with his first name.

Caleb - He's white/caucasian. But he can't be blonde, at least not a really light blonde because he's dating Blake who is blonde. He also has to have the same surname as Skye, because they're siblings, and the surname would have to be either to do with the sky/flying, or protection/safety.

Skye - Also white/caucasian. She has to have the same surname as Caleb because they're related.

Aaliyah - Can either be black(African-American or Asian) She's very beautiful, so much so that she can put people to sleep with her looks. Again, something that goes with her name, could be soft or light-hearted sounding. .

Jaden - Need physical appearance, he's adopted. I was thinking of using the name Campbell but if you have an improvement, it'd be welcome.