We love the name Finley, Finn for nickname

Almost certain our son will have dark hair and the name means fair hair warrior. Do you think that matters? Also I think we'll prolly call him Finn alot. Should we spell his name Finnley to match or Finley? Or Finley and Fin? Too many questions...I know! Also, do you like the name :) Other name we love is Myles. I feel like Finn is a lil more unique and that's what I'm going for.