Coat of arms of the town of Tepecoacuilco de Trujano my sources are the encyclopedia of the municipalities of Mexico and the Codice Mendoza where the glyph of Tepequacuilco already appears. 
https://enciclopediagro.mx/indice-municipios/municipalidad-de-tepecoacuilco-de-trujano /

https://www.codicemendoza.inah.gob.mx/index.php?lang=spanish&amp;folio_number=12&amp;type=r&amp;section=t
Own work
COAmaker17