Hun Hunahpu, One Hunahpu, is a central figure of the Popol Vuh, the sacred narrative of the Kiche Maya, and the father of the Hero Twins, Hunahpu and Xbalanque. Scholars widely identify him with the Classic Maya maize god, one of the most important of all Maya deities, so that his story is at root the story of maize, its death in the earth and its rebirth as the sprouting plant.
In the narrative, Hun Hunahpu and his brother Vukub Hunahpu are keen ballplayers whose noise disturbs the lords of the underworld, Xibalba, who summon the pair down to the underworld ballcourt. There the brothers are defeated by the trials the lords set for them, and they are sacrificed and buried. On painted Classic Maya ceramics, Hun Hunahpu's resurrection is shown through a recurring, instantly recognisable image: a youthful figure with the elongated, cob-shaped head and foliated headdress characteristic of what scholars call the Tonsured Maize God, emerging from a crack in the earth, often rendered as the cracked shell of a turtle. That image, maize sprouting from the broken carapace of the earth-turtle, gives visual form to the Popol Vuh's underlying logic: the buried grain and the buried god rise together, so that Hun Hunahpu's myth is at root an explanation, cast as a hero's death and revival, of how the maize crop is renewed each planting season.