Epcoatzin.

a great lord of Tlatelolco, he was a son of Tlacateotzin and Xiuhtomiyauhtzin; he was the father of Tecapantzin, and therefore grandfather of Cuauhtemoc

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. 2, 78–79, 112–113.