Quiyahuizteca.

an ethnic group, ancient inhabitants of Tamoanchan in the southern basin, Valley of Mexico

(Quauhtinchan, s. XVI)
Historia Tolteca-Chichimeca, eds. Paul Kirchhoff, Lina Odena Güemes, y Luis Reyes García (México: CISINAH, INAH-SEP, 1976), 137, note 6.