a ruler (e.g. regidor, governor, or president); also seen as tepachoani (see Molina)
Alonso de Molina:
tepacho. regidor, gouernador o presidente. 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.