Ontoampa.
American: tribe of Vilela.
Oodeypoora.
Hindi of Mewar or Chitore in Rajpootana. The Rajah of Oodeypoor is said to hold the most ancient hereditary sovereignty in the world.
Oojeini.
Hindi of Malwa.
Oordu.
Same as Urdu. See [Hindostani].
Opata.
American: dialect of Sonora, in Mexico. Classed with Pima and Eudeve.