Ezio is the first name of the Italian Assassin who leads the story of Assassin's Creed II.
His full name is Ezio Auditore da Firenze, and the game follows his transformation from a young Florentine nobleman into a trained Assassin. The story begins in Florence in the late 15th century and later takes Ezio to locations including Venice, Forlì, and the Tuscan countryside.
Assassin's Creed II was released in 2009 and expanded the original game's systems with a larger range of weapons, economic activities, and optional missions. Historical figures such as Leonardo da Vinci become important allies during Ezio's journey.
Ezio's story continues in Assassin's Creed: Brotherhood and Assassin's Creed: Revelations. Because he is the protagonist of a trilogy, he is often regarded as one of the franchise's defining characters. His first name, rather than his family name, is the short canonical answer to this question.