A famous man associated with Colhuacan was given the title "Itzcotecatl" according to Diego Durán.
Diego Durán, The History of the Indies of New Spain (1994), 99.
"ytoca yzcotecatl = named Itzcotocatl[?]" -- The vowel change here is copied precisely as published. (Cuernavaca region, ca. 1540s)
The Book of Tributes: Early Sixteenth-Century Nahuatl Censuses from Morelos, ed. and transl. S. L. Cline, (Los Angeles: UCLA Latin American Center Publications, 1993), 128–129.
"I, Pedro de Paz, councilman, interrogated the Palpan elders: the first Martín Tlacuchcalcatl,² the second Miguel Itzcotecatl...."
Beyond the Codices, eds. Arthur J. O. Anderson, Frances Berdan, and James Lockhart.
Another Juan Itzcotecatl is mentioned in a letter in Nahuatl of 1557.
Jan Szeminski, John Sullivan, and Justyna Olko, Dialogue with Europe, Dialogue with the Past: Colonial Nahua and Quechua Elites in Their Own Words (Boulder: University Press of Colorado, 2018), and see item #24; https://muse.jhu.edu/pub/173/edited_volume/chapter/2250737