Tlacochcallan.

a place name equated with Tlacochcalco in some sources; said to be "dos pueblos" (two pueblos); also translated as the "casa de dardos"
See: https://www.lavozdelnorte.com.mx/2014/04/13/migraciones-de-lengua-nahuat... and https://historiasleyendasycuentosdemexico.es.tl/Cap%EDtulos-11-a-20.htm