Yax Nuun Ahiin II also known as Ruler C and Chitam, (before 768-c.794), was an ajaw of the Maya city of Tikal. He took the throne on December 25, 768 and reigning probably until his death. He was son of Yik'in Chan K'awiil and brother of 28th Ruler. The monuments associated with Yax Nuun Ahiin II are: Stelae 19, 21 and Altars 6 and 10.