the sacristan (see Molina), literally, the keeper of holy things or churchly things
Alonso de Molina:
teotlatqui pixqui. sacristan. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 101v. col. 1. Thanks to Joe Campbell for providing the transcription.