ontlamantli.

Headword: 
ontlamantli.
Principal English Translation: 

two things, two parts, or pairs (see Molina)

IPAspelling: 
oːntɬɑmɑntɬi
Alonso de Molina: 

ontlamantli. dos cosas, partes, o pares.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 77r. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in Spanish: 

oc ome, oc ontetl, u oc ontlamantli = another two
Rémi Siméon, Diccionario de la lengua náhuatl o mexicana (Mexico: Siglo XXI, 1988), xlvii.