Tlamatzinco.

Headword: 
Tlamatzinco.
Principal English Translation: 

one of the original twenty-five barrios of Azcapotzalco, devoted to Saint Thomas; with a sixteenth-century Dominican church still standing
https://mexicocity.cdmx.gob.mx/venues/santo-tomas-tlamatzingo/

Orthographic Variants: 
Tlamatzingo