tatia.

Headword: 
tatia.
IPAspelling: 
tɑhtiɑː
Alonso de Molina: 

tatia. nicno. (pret. onicnotati.) tomar a otro por padre.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 91r. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

TAHTIĀ vt to take someone as one's father / tomar a otro por padre (M) [(2)Rp.129]. M gives this with a direct object prefix plus an oblique reflexive prefix, while R has only a direct object. R also gives this as an intransitive meaning 'to become a father.' See TAH-TLI.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 214.