Principal English Translation: 

a person from Acolhuacan; an inhabitant of the Tetzcoco region (see Karttunen)

Orthographic Variants: 
Frances Karttunen: 

ĀCŌLHUAH person from Acolhuacan / fuerte, es también nombre de nación (R) [(1)Bf.12v,(1)Rp.59].
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 3.

Lockhart’s Nahuatl as Written: 

ācōlhuah = inhabitant of the Tetzcoco region
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 210.

Attestations from sources in English: 

Auh ie ixqujch caujtl qujpia in tlatocaiotl in aculhoaque in ie ic mocempoa caxtolpoalxiujtl ioan nauhxiujtl. in ixquich cauitl in oacico españoles = And in all the time that the Acolhua kept the reign, in all, have been counted three hundred and four years until the time the Spaniards arrived. (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 8 -- Kings and Lords, no. 14, Part IX, 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, 1951), 11.

Aculhuaque = plural, the Acolhua people (also: aculhoaque), the people of the Teztcoco region of Mexico.