Ahuachpahin.

a personal name; e.g. don Pablo Ahuachpahin seems to have been a chronicler in Tetzcoco at the time of the Spanish invasion and colonization of Mexico; he possibly wrote of the events of that period in a narrative that ended up in in the Codex Chimalpahin (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. 2, 196–197.