Is there a real person named Harry Potter?

Harry Potter is not based on an actual person. JK Rowling has been quoted as saying:

I had been writing almost continuously since the age of six but I had never been so excited about an idea before. I simply sat and thought, for four (delayed train) hours, and all the details bubbled up in my brain, and this scrawny, black-haired, bespectacled boy who did not know he was a wizard became more and more real to me.

The actor who brought Harry to life on the screen is Daniel Radcliffe. Radcliffe played Harry Potter in all of the movies.