The Green Mile & Harry Potter

I have read the Harry Potter books and then a little while after that the Green Mile by stephen king. I noticed something funny. In the Green Mile there are alot of names from Harry Potter. Like: Harry, Hermione, Percy, Bill, Dean, I think there are some more. Perhaps its coincidance, but I did see that Stephen King said he has read the Harry Potter books. The text says copyright 1996. Was Harry Potter printed before then? Not sure... OR could Rowlings be copying Stephen King? I dunno... Strange....