a deity's name, a name associated with Tezcatlipoca (see attestations); also, the name of a person from San Sebastián Matlahuacala, Tlaxcala, who tried to convince people not to accept baptism or Christian teachings ca. 1521; in lower case (necoc iautl), more generally, a traitor (see Sahagún)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 10 -- The People, No. 14, Part 11, 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, 1961), 38.