atemitl. piojo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 7v. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
ATEM(I)-TL louse / piojo (M) Z has a long initial vowel, while X has the variant form ATIN-TLI; possessed form: -ATEN Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 12.