Yax Nuun Ahiin II[N 1] 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.

[N 2] 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.

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