Norbert
A Norwegian-Ridgeback dragon that is given to Hagrid by a mysterious hooded stranger (later revealed to be Professor Quirrell) while still an egg. After plying Hagrid with drinks, Professor Quirrell was able to convince Hagrid to tell him about Fluffy in exchange for the dragon egg. After Draco Malfoy sees the newly-hatched (and highly illegal) Norbert through the window of Hagrid's cabin, Harry, Hermione, and Ron smuggle the dragon to the highest tower of Hogwarts in order to give it to some friends of Charlie Weasley, Ron's brother who works with dragons in Romania. In later books, it is revealed that Norbert is actually a female dragon, and she is renamed "Norberta.