Cozcateca.

Headword: 
Cozcateca.
Principal English Translation: 

a kingdom of Tula (Tollan) that pertained to the Toltecs; an ethnic group; an enemy of the Mexica (central Mexico, sixteenth century)
Literaturas de Anahuac y del Incario / Literatures of Anahuac and the Inca, ed. Miguel León-Portilla (Mexico City: Siglo Veintiuno Editories, 2006), 192.

Attestations from sources in English: 

auh no iehoanti, yn iiaooan altepetl, tlateputzca, ynjn ca manca teuatl, tlachinolli, qujmonnotzaia ichtaca, oalichtacacalaquja, yn jcooapan motecuçuma: yn nonooalca, cozcateca, cempoalteca, mecateca, tlaltitiloia, tlamaujçoltiloia: njman ic xitinooa, necacoalo = And also from the warring cities, from beyond [the mountains] those with whom there was war, were summoned, in secret, and came within, in Cozcateca, the Cempoalteca, the Mecateca. [These ceremonies] were shown to them, and they were confounded. For thus they were undone and disunited. (sixteenth century, Mexico City)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 2—The Ceremonies, No. 14, Part III, 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, 1951), 53.