Should be sued for plagiarism

I don't think it was a case of intentional plagiarism. She may have heard the name at one time, forgotten where he had originally heard it, and used what she felt was an ordinary name best suited for her story. I mean, think of it. "Harry" isn't an unusual first name and "Potter" isn't an unusual last name (I had a friend who's last name was Potter).

You can't plagiarise a name, just a character.