In Assassin's Creed III, Connor Kenway is associated with the Mohawk nation.
Connor's birth name is Ratonhnhaké:ton, and he is the son of the British Templar Haytham Kenway and Kaniehtí:io, a Mohawk woman. He grows up in the Kanien'kehá:ka village of Kanatahséton before becoming an Assassin and taking the name Connor for easier interaction with colonial society.
The game follows his life during the American Revolution, placing his personal struggle alongside the conflict between the Assassin Brotherhood and the Templars. The Mohawk setting is central to Connor's identity, although the game also presents many colonial cities and historical figures.
The Iroquois term can cause confusion because the Mohawk are one of the Haudenosaunee, or Iroquois Confederacy, nations. “Mohawk” is the specific nation associated with Connor, not a synonym to use as the answer when the question asks for his nation.