Tzihuacxochtzin.

a woman who was killed with the sister and daughter of Huitzilihuitl in the thirteenth century; also the name of a daughter of Xaltemoctzin or Ceahuatzin and a younger sister of Tlacateotzin who lived in Azcapotzalco; Tlacateotzin took his sister as one of several wives, and with her he bore two sons, Moteucnonotza and Nochhuetzin

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, 76–77, 112–113.