Tiberius (fl. 1970) was a wizard and the uncle of Cormac McLaggen. Tiberius worked at the Ministry of Magic, and according to Draco Malfoy was highly influential there. He was close with the Minister for Magic, Rufus Scrimgeour, and would often go hunting Nogtails with him and Bertie Higgs. When he attended Hogwarts School of Witchcraft and Wizardry, he was a member of Horace Slughorn's Slug Club.
The name "Tiberius" is a Roman praenomen, or given name, meaning "of the Tiber" in Latin. The Tiber is the river that runs through Rome. Tiberius was the second Roman emperor, the stepson of emperor Augustus. He was a paranoid and sadistic emperor who ordered mass arrests whilst spending most of his time in his palace on the Isle of Capri, engaging in all manners of sexual immorality.
- Harry Potter and the Half-Blood Prince (First mentioned)
- Harry Potter and the Half-Blood Prince (film) (Mentioned only)