There is a sample map from the upcoming atlas that features American Indian Placenames:

http://www.atlasofyellowstone.net/slideshow/index.html

http://www.davidrumsey.com/directory/what/Indians/

Among the holdings of the Benson Latin American Collection, the Relaciones Geográficas collection is consistently a major attraction for visiting scholars. Documents within the Relaciones Geográficas collection have dates ranging from 1578 to 1586 and serve as primary sources of information about the Spanish conquest of Middle America.