The first name used for Assassin's Creed III's protagonist is Connor.
Connor is the English name adopted by Ratonhnhaké:ton, a Kanien'kehá:ka man who becomes an Assassin during the American Revolutionary War. The game follows his efforts to protect his community while opposing Templar influence in the colonies.
Assassin's Creed III was released in 2012 and presents Connor's story alongside that of his father, Haytham Kenway. Haytham is initially introduced as the playable protagonist before the narrative shifts to Connor. This family connection is one of the series' central revelations.
Connor is not the same character as Desmond Miles, the modern-day protagonist who experiences ancestral memories through the Animus. His birth name is Ratonhnhaké:ton, while Connor is the shorter name most commonly used in the game and promotional material.