on the east (see Molina); literally, it comes from the sun's rising place
Orthographic Variants:
tonatiuh yquizayampa uitz
Alonso de Molina:
tonatiuh yquizayampa uitz. cosa oriental. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 149v. col. 2. Thanks to Joe Campbell for providing the transcription.