What is the name of the fictional Quidditch historian who wrote Rowling’s Quidditch book?

Kennilworthy Whisp is the fictional Quidditch historian who wrote Rowling’s Quidditch book.

Quidditch Through the Ages is credited in-universe to Kennilworthy Whisp. J. K. Rowling published the book in 2001 as a companion volume to the Harry Potter novels, presenting a humorous history of the wizarding sport.

The book discusses Quidditch’s development, equipment, famous teams, and changing rules. Its fictional library markings make it appear to be a Hogwarts reference book borrowed by Harry and Ron.

The real-world edition was published to raise money for Comic Relief. It was released alongside Fantastic Beasts and Where to Find Them, another charity companion book presented as a Hogwarts school text. The author’s name is therefore a fictional attribution, not an additional Rowling pseudonym.