There are a lot of facts about Aztec mythology. In order to answer a specific question in regard to this mythology one needs more information.

The Aztec's mythology consisted of gods from their earlier ancestors, ones they created themselves, and the gods of tribes they conquered.

Clara Bezanilla has written:

'A pocket dictionary of Aztec and Mayan gods and goddesses' -- subject(s): Maya gods, Aztec mythology, Maya mythology, Aztec gods, Juvenile Dictionaries

In Aztec and Toltec mythology, Quetzalcoati was the feathered serpent god.

Greek mythology = Hades

Roman mythology = Pluto - Hades ripoff like most Roman gods

Norse mythology = Hel

Aztec mythology = Mictlantecuhtli

Hope this has answered your question :)