Twins appear in the mythologies of many cultures around the world. In some cultures they are seen as ominous, and in others they are seen as auspicious. Twins in mythology are often cast as two halves of the same whole, sharing a bond deeper than that of ordinary siblings, or seen as fierce rivals. They can be seen as representations of a dualistic worldview. They can represent another aspect of the self, a doppelgänger, or a shadow.

The Maya Hero Twins are the central figures of a narrative included within the colonial Kʼicheʼ document called Popol Vuh, and constituting the oldest Maya myth to have been preserved in its entirety. Called Hunahpu and Xbalanque in the Kʼicheʼ language, the Twins have also been identified in the art of the Classic Mayas. The twins are often portrayed as complementary forces.