Tlaneltoquiliztli is a reference to the Christian faith. In some annals of Puebla we see a reference to a frightening time of war in the late seventeenth century, and how nothing that frightening had been seen since the arrival of the new faith, equating this arrival with the Spanish invasion or conquest. (Puebla; referring to 1682; published in the eighteenth century)
Anales del Barrio de San Juan del Río; Crónica indígena de la ciudad de Puebla, xiglo XVII, eds. Lidia E. Gómez García, Celia Salazar Exaire, y María Elena Stefanón López (Puebla: Instituto de Ciencias Sociales y Humanidades, BUAP, 2000), 107.
"ipan acaxihuitl hohuasico yn tlaneltoquilistl hoCuamohuiquili D. hernando cortes homaxitico ypā Viernes Santo" = "In Reedyear the Faith arrived. Don Hernando Cortés brought it here. He arrived on Good Friday." (the context here is an entry referring to 1519)
Frances Krug, "The Nahuatl Annals of the Tlaxcala-Puebla Region," ch. 5, p. 11, Ph.D. Dissertation draft written in the 1980s, with transcriptions and translations approved by James Lockhart. Cited here by SW.
"1519 Acatl ohuala in Fernando Cortes ocualicac in tlaneltoquiliztli ihuan ipan inin xihuitl ocatica zahuatzintli (p. 739)." = "1519 Reed (year). Fernando Cortés arrived; he brought the Faith. And in this year a pox broke out." (Note the timing of the invasion and the start of the first epidemic. (SW)
Frances Krug, "The Nahuatl Annals of the Tlaxcala-Puebla Region," ch. 5, pp. 13–14, Ph.D. Dissertation draft written in the 1980s, with transcriptions and translations approved by James Lockhart.