a title for an indigenous ruler or governing person; he could be a military officer (see attestations)
Don Martin tlacateccatl, ic chiquacen tlatocat in tlatilulco chicoacexiujtl = Don Martín Tlacatecatl [was] sixth, and he ruled Tlatilulco for six years. (central Mexico, sixteenth century)
Jacobo Tlacatecatl is someone who has a name or title glyph that is the diadem (xiuhhuitzolli) of a tlatoani, and his wife has a beautiful name glyph with what appear to be quetzal feathers. They are definitely a step above the average tribute payer in the social hierarchy, but below the person governing their barrio. Perhaps he is a centecpanpixqui.
"In the Aztec military, tlacateccatl (pronounced [t͡ɬaːkaˈteːkkat͡ɬ]) was a title roughly equivalent to general. The tlacateccatl was in charge of the tlacatecco, a military quarter in the center of the Aztec capital, Tenochtitlan. In wartime he was second-in-command to the tlatoani ('ruler', 'king') and the tlacochcalcatl ('high general'). The tlacateccatl was always a member of the military order of the Cuachicqueh, 'the shorn ones'."