Where are descendants of Aztecs today?

There are no descendants of the Aztecs today. The Aztecs were ruthlessly hunted down and exterminated by the people whom they had formerly subjugated. After years of having to give up their family members as human sacrifices, these people exacted revenge upon any Aztecs they could find.

Very few escaped from the siege of Tenochtitlan and those that did were quickly hunted down and killed.

The irony is that many Mexicans claim to be descended from the Aztecs, when in fact they are descendants of the people who exterminated them.