Names
- Obama, Barack1
- Ohata, Robert1
- Ojibwa Indians13
- Okamoto, Neal T.1
- Omori, Morio2
- Omori, Rachel1
- Ong, Yoke Lin1
- Onizuka, Ellison S.1
- Onodera, Masayoshi1
- Osage Nation57
- Osage Tribe5
- Osage Tribe, Oklahoma168
- Oshiro, Paul T.1
- Otoe Nation8
- Otoe-Missouria Tribe of Indians25
- Otoe-Missouria Tribe of Nation2
- Ottawa Indians1
- Ottawa Tribe20
- Ottawa Tribe of Oklahoma57
- Packwood, Bob2
