See an image that represents Tetzcoco in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).
In jpan xiujtl 1521, oc ceppa oallaque in españoles, ompa omotlalique, in tetzcuco, uecauhtica qujniauchiuhque, qujmpeuhque, qujmjcalque, in mexica. = In the year 1521, the Spaniards came once more. They stayed there in Texcoco. After some time they made war, and they vanquished and fought the Mexicans. (central Mexico, sixteenth century) Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 8 -- Kings and Lords, no. 14, Part IX, 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), 22. Tetzcoco was a prominant part of Acolhuacan. See the glyph for the conquest of Acolhuacan in the Codex Mendoza, lámina 5v. ¶ i tecpatl xihuitl 1532 años ypan in momiquilli Don hernando cortes yxtlilxochitzin thahtohuani tetzcuco yehuatl in y huel quinpalehui españoles ynic cacique mexico = The year One Flint, 1532. At this time don Hernando Cortés Ixtlilxochitzin, ruler of Texcoco, died. He was the one who aided the Spaniards well when they captured Mexico. (central Mexico, early seventeenth century) Codex Chimalpahin: Society and Politics in Mexico Tenochtitlan, Tlatelolco, Culhuacan, and Other Nahuatl Altepetl in Central Mexico; The Nahuatl and Spanish Annals and Accounts Collected and Recorded by don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, eds. and transl. Arthur J. O. Anderson and Susan Schroeder (Norman: University of Oklahoma Press, 1997), vol. 1, 236, 237. Tetzcoco had six divisions: Mexicapan, Culhuacan, Tecpanecapan, Huitznahuac, Chimalpan, and Tlailotlacan. (Citing Ixtlilxochitl, vol. I, 164.) Edward John Payne, History of the New World Called America, Book II, Aboriginal America (Clarendon Press, 1899), 538, note 1.