He is very like his uncle Earl Spencer.. And has the look of The Duke when he was a young lad.. It's cos he has ginger hair everyone assumes the Hewitt connection..
Yes, willfully ignoring the red hair in Diana's family.
Harry looks very 'Spencer' to me. Not particularly like his mother but certainly like her siblings.
As for Kate and Wills, I don't think anyone needs to hold their breath in anticipation of anything even remotely off the list of usual suspect royal names for the first born.
I recall reading that Diana wanted to call William Stephen, but it wasn't considered royal enough.