
1) Indigenous Mexican 2) Mexican indian 3) Mexican indians 4) Mexican language or people 5) Mexican tribe 
Found on 
https://www.crosswordclues.com/clue/otomi
 [military]
[military]  The Otomi or Otontin were an elite Aztec military order, named after the Otomi people. The Otomies (Otontin [21]) were another warrior society who took their name after the Otomi people who were renowned for their fierce fighting. In the historical sources it is often difficult to discern whether the word otomitl `Otomi` refers t...
Found on 
http://en.wikipedia.org/wiki/Otomi_(military)

Middle American Indian population living in the central plateau region of Mexico. The Otomí peoples speak at least four closely related languages, ... [3 related articles]
Found on 
http://www.britannica.com/eb/a-z/o/38

a member of an American Indian people of south-central Mexico. · the Oto-Manguean language of the Otomi.
Found on 
https://www.infoplease.com/dictionary/otomi
  No exact match found.