Quidditch first appeared as a fictional sport, played by wizards on flying broomsticks, in her book series.
The real-life version is a fast-paced contact sport, played by more than 450 teams in over 30 countries.
A spokesman for the author pointed out these Quidditch leagues had not been endorsed by Rowling in the first place.
In a joint statement first reported by The Times, US Quidditch (USQ) and Major League Quidditch (MLQ) said they would now decide on new names for the game.
