Yat Ahk I

Yat Ahk I^[1] was the third king of Mayan city-state Piedras Negras in Guatemala. He is also known as Ah Cauac Ah K'in, and by the English translation of his name, Turtle Tooth.^[2]

Yat Ahk I
King of Piedras Negras
Yat Ahk I's glyph
Predecessor	Piedras Negras Ruler B
Successor	Piedras Negras Ruler C
Father	unknown
Mother	unknown
Religion	Maya religion

The first mention of Yat Ahk I comes in the inscriptions of Yaxchilan when one of his sublords is captured by Knot-eye Jaguar I.^[3] However, it is likely that Piedras Negras had gained some degree of ascendancy over Yaxchilan.

It is possible that he is depicted on Panel 2.

His successor was Piedras Negras Ruler C. He could be his son.

The eleventh and final ajaw of Piedras Negras, K'inich Yat Ahk II, appears to have taken his name in memory of Yat Ahk I.^[1]