Robert Haskett and Stephanie Wood's notes from Nahuatl sessions with James Lockhart and subsequent research.
Orthographic Variants:
iuiptlayoc
Alonso de Molina:
iuiptlayoc. dos dias despues. aduerbio. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 44r. col. 2. Thanks to Joe Campbell for providing the transcription.