The Troll of Nadroj is covered in The Monster Book of Monsters and, as such, was part of the third-year Care of Magical Creatures curriculum at Hogwarts School of Witchcraft and Wizardry under Professor Rubeus Hagrid-
Behind the scenes
- "Nadroj" is "Jordan" written backwards. As such, the name of this breed of troll may be a reference to the propmaker.
- Harry Potter and the Prisoner of Azkaban (film) (Mentioned only)