Piedras Negras Ruler C was a king of that Maya city-state.
He was the fourth ruler of Piedras Negras, the successor of Turtle Tooth, who could be his father.
In the figural scene, Ruler C stands over three kneeling captives, one of whom is Knot-eye Jaguar I of Yaxchilan, who had captured a vassal of Turtle Tooth around 508.
[1] His successor was K'inich Yo'nal Ahk I.
It is unknown if he was a son of Ruler C. This royalty-related article is a stub.