As with just about everything to do with the 'Toltecs', whom the Aztecs and other central Mesoamerican cultures of the Postclassic era held up as their valiant precursors whose legacy and authority they inherited, actual and discernible historical data is scant.
As the Aztecs began settling what would later become their homelands, an elite emerged (the pipiltzin) that claimed descent from the Toltecs, the former empire of Central Mexico.
Also, the area has been inhabited by various indigenous peoples such as the Otomi, the Mexica, the Toltecs and the Tepehua.