christianoyotl.

(a loanword from Spanish)

Headword: 
christianoyotl.
Principal English Translation: 

Christianity
(a Nahuatlized loanword from Spanish)

Alonso de Molina: 

christianoyotl. christiandad.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 22r. col. 1. Thanks to Joe Campbell for providing the transcription.