Oto

[n] - a member of the Siouan people inhabiting the valleys of the Platte and Missouri rivers in Nebraska 2. [n] - a dialect of the Chiwere language spoken by the Oto people
Found on http://www.webdictionary.co.uk/definition.php?query=Oto

Oto

Otoe noun a dialect of the Chiwere language spoken by the Oto
Found on https://www.encyclo.co.uk/local/20974

Oto

North American Indian people of the Chiwere branch of the Siouan linguistic family, which also includes the closely related Missouri and Iowa tribes. ...
Found on http://www.britannica.com/eb/a-z/o/38

Oto

Oto (ō'tō) , Native North Americans, also called the Otoe, whose language belongs to the Siouan branch of the Hokan-Siouan linguistic stock (see Native American languages). The Oto had a Plains area type of culture. At one time, with the Iowa and the Missouri, they formed part of the...
Found on http://www.infoplease.com/ce6/society/A0837053.html

OTO

Same as tachi.
Found on http://www.samuraisword.com/glossary/index.htm
No exact match found