teahui.

Headword: 
teahui.
Principal English Translation: 

aunt; the sister of one's mother or father (see Molina)

Orthographic Variants: 
teaui
Alonso de Molina: 

teaui. tia. hermana de padre o de madre.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 91v. col. 1. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

yn teaui mamale yn qualli teaui tlaocullo in iiollo, icnoio, tepan tlatoani, tehiceliani, tlaҫotli in iiollo, tetlaҫotlani, tetlaҫotla motecuitlauia, teca motequipachoa = One's aunt [is] a provider for [her nieces and nephews]. One's good aunt [is] merciful, of good memory, kind; an intercessor, solicitous, of noble birth, loving. She admires others, cares for them, is solicitous of others (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 10 -- The People, No. 14, Part 11, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1961), 3–4.