Professor Arsenius Jigger was a wizard and an author specialising in Potions and Defence Against the Dark Arts, having written: Magical Drafts and Potions, Potion Opuscule, and The Essential Defence Against the Dark Arts.
Arsenius Jigger was also, at an unknown point, a professor of Defence Against the Dark Arts at Hogwarts School of Witchcraft and Wizardry. A shop in Diagon Alley bears the name Slug and Jiggers, and may belong to him.
- Arsenius may be derived from the word "arsenious" meaning "containing arsenic", a very poisonous metallic element. Arsenius may also be be a reference to the famous physicist and chemist Svante Arrhenius. A jigger is a liquid measurement, often for liquor, of 1½ fluid ounces (44 millilitres).
- Harry Potter and the Philosopher's Stone (First mentioned)
- Harry Potter and the Prisoner of Azkaban (film) (Name appears on book cover and carved into wood panel)
- Harry Potter Page to Screen: The Complete Filmmaking Journey (Mentioned only)
- Pottermore (Mentioned only)
Notes and references