one who gives consent or grants something, nodding the head
IPAspelling:
iːʃtɬɑhtoɑːni
Alonso de Molina:
ixtlatoani. consentidor tal. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 48r. col. 2. Thanks to Joe Campbell for providing the transcription.