- Speakers of Nahuatl, as well as speakers of some Oto-Pamean languages
- People living in Tenochtitlan (the Mexica).
- People living in other places in the Valley of Mexico (there is no good indigenous term for these people).
- People living in the surrounding valleys (Morelos, Puebla, Tlaxcala, Toluca, etc.) who interacted heavily with those in the Valley of Mexico and shared many social and cultural trains with them.
I realize that some colleagues, who want to limit the term Aztec to the inhabitants of Tenochtitlan, will probably jump on me for my decision. But those of Tenochtitlan have TWO good names that they used themselves: Mexica, and Tenochca. But since the word "Aztec" was rarely used before the Spaniards arrived, and because there is no native term for the peoples of central Mexico at that time (although they clearly formed a significant social and cultural entity), and because no one has proposed a succinct alternative label, Aztec remains the term. Also, I doubt that Blackwell would want me to change the name of the book to "The peoples of central Mexico in the final centuries before AD 1519, including speakers and Nahuatl and other native languages."