Writer Ed Naha and the Troll producers should have sued the shit out of J.K. Rowling.the movie "Troll"(1986) features this exchange between witch Janice St.Claire and Harry Potter Jr. (the movie's main character)
Ed would then have to turn around and explain his direct lifts of Sergio Leone's movie plots for his "Traveler" novels.
Unless they trademarked the name "Harry Potter," they wouldn't have much of a case. And it's not like "Harry Potter" is all that unusual a name.
For a long time every time I heard the name, all I could think of was a M*A*S*H character.
Granted, one might want to think twice about naming a character "James Bond" or "Scarlet O'Hara" . . ..
GI Joe managed to get away with Shana "Scarlett" O'Hara, though.