The Pipils or Cuzcatlecs are an indigenous people who live in western El Salvador, which they called Cuzcatlan. Their language is called Nahuat or Pipil, related to the Toltec people of the Nahuatl Nation. Evidence from archeology and ethnohistory also supports the southward diffusion thesis, especially that speakers of early Nahuatl languages migrated from northern Mexican deserts into central Mexico in several waves. However, in general, their mythology is more closely related to the mythology of the Maya peoples who are their near neighbors and by oral tradition said to have been adopted by Ch'orti' and Poqomam Mayan people during the Pipil in the 9th century CE, led by Topiltzin Quetzalcoatl.