Principal English Translation:
a place in the midst of the lagoon near Mexico Tenochtitlan not to far from the site associated with the Virgin of Guadalupe (Tepeyacac), near Pantitlan, and not too far from Tlatelolco; Tepetzinco was a place much involved in prehispanic rituals
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), 68.
Attestations from sources in English:
During the four days of dancing and singing prior to the slaying of the captive who was prepared in the month of Toxcatl to represent the deity, Tezcatlipoca, Tepetzinco was the location for dancing on the third day.
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), 68.