tehuan.

Headword: 
tehuan.
Principal English Translation: 

in the company of someone (see Karttunen); with another person, or with others (see Molina)

Orthographic Variants: 
teuan
IPAspelling: 
teːwɑːn
Alonso de Molina: 

teuan. con otro, o con otros.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 111v. col. 2. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

TĒHUĀN in the company of someone / con otro o con otros (M) [(2)Tp.227]. This contrasts with the pronoun TEHHUĀN 'we.' See -HUĀN.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 219.

Attestations from sources in English: 

tehuan = we; with someone
Daniel Garrison Brinton, Ancient Nahuatl Poetry: Containing the Nahuatl Text of XXVII Ancient Mexican Poems (1887), 162.