| Answer | Crossword Clue |
|---|---|
| OSAGE | Tribe based in Oklahoma |
| OTOES | Tribe living in Oklahoma. |
| OTOES | Siouan tribe, now in Oklahoma. |
| OTOE | Tribe headquartered in Red Rock, Oklahoma |
| OTOE | Native American tribe now living in Oklahoma |
| OTO | One of a Siouan tribe now in Oklahoma. |
