Tlacochin.

Headword: 
Tlacochin.
Principal English Translation: 

a person's name (usually male, although not always specified); also, Tlacochintzin, a principal merchant in the time of Moquiuixtzin in Tlatelolco (central Mexico, sixteenth century); the root of the name is the word for lance, spear, or javelin
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 9 -- The Merchants, No. 14, Part 10, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1959), 2.

Attestations from sources in English: 

This was a youth of fifteen, gender not specified. (Cuernavaca region, ca. 1540s)
The Book of Tributes: Early Sixteenth-Century Nahuatl Censuses from Morelos, ed. and transl. S. L. Cline, (Los Angeles: UCLA Latin American Center Publications, 1993), 170–171.

Tlacoch and Tlacochin are personal names that can be found many times in the Matrícula de Huexotzinco:
https://aztecglyphs.wired-humanities.org/content/tlacochin-mh485v
https://aztecglyphs.wired-humanities.org/content/tlacochin-mh497r
https://aztecglyphs.wired-humanities.org/content/tlacochin-mh498v
https://aztecglyphs.wired-humanities.org/content/tlacoch-mh554r
https://aztecglyphs.wired-humanities.org/content/tlacochtemoc-mh525v

Tlacochcalcatl may be a title that relates to this name, too. See for example:
https://aztecglyphs.wired-humanities.org/content/tlacochcalcatl-mdz65r

themes: 
Names (for people, deities)
Weapons, Shields, Heraldry