tlazcaltilli.

Headword: 
tlazcaltilli.
Principal English Translation: 

a child placed under the care of a tutor; or, someone adopted (see Molina and Karttunen); also, one or more domestic animals (see attestations)

IPAspelling: 
tɬɑskɑltiːlli
Alonso de Molina: 

tlazcaltilli. lo mesmo es que tlazcalilli.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 146v. col. 2. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

TLAZCALTĪL-LI child placed under the care of a tutor, someone adopted / prohijado, ahijado (Z) [(3)Zp.7,102,161]. Literally this just means ‘someone reared.’ See (I)ZCALTIĀ.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 306.

Attestations from sources in Spanish: 

tlazcaltiltin pitzome ychcame in iyaxca comunidad = animales domésticos: puercos y ovejas propiedad de la comunidad (Cuauhtinchan, Puebla, s. XVI)
Luis Reyes García, "Ordenanzas para el gobierno de Cuauhtinchan, año de 1559," Estudios de Cultura Náhuatl 10 (1972), 306–307.

themes: 
Children, Childhood, Adolescence