•   O Du
    Ethnic Group: O Du
    Population: 400
    Language(s): O'du, Vietnamese, Lao
    Religion: Animism, Christianity
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    Photo By: Henritours, http://henritours.com/services/view/36/Odu- people.html
  •   O-Chi-Chak-Ko-Sipi First Nation
    Ethnic Group: O-Chi-Chak-Ko-Sipi First Nation
    Population: 948
    Language(s):
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  •   O’Chiese First Nation
    Ethnic Group: O’Chiese First Nation
    Population: 1,108
    Language(s): Saulteaux, Cree, English
    Religion:
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    Photo By: Flat Stanley's O'Chiese First Nation School adventure, http://flatstanleysocfnschooladventure.blogspot.com/
  •   Obedjiwan
    Ethnic Group: Obedjiwan
    Population: 2,955
    Language(s): Attikamek, French
    Religion:
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  •   Ocaina
    Ethnic Group: Ocaina
    Population: 325
    Language(s): Spanish
    Religion: Traditional Religion
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  •   Occaneechi
    Ethnic Group: Occaneechi
    Population: 1,160
    Language(s): Occaneechi, English
    Related Ethnic Group(s):
    • Biloxi
    • Sappony
    • Mosopelea
    Religion: Indigenous Religion
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  •   Occitan
    Ethnic Group: Occitan
    Population: 16,000,000
    Language(s): Occitan, French, Spanish, Italian, Catalan
    Related Ethnic Group(s):
    • Spaniard
    • Basque
    • Catalan
    • Italian
    • French
    Religion: Protestantism, Catholicism, Judaism
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  •   Ochapowace
    Ethnic Group: Ochapowace
    Population: 1,511
    Language(s): Cree
    Religion:
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    Photo By: Ochapowace Nation, http://ochapowace.com/
  •   Odanak
    Ethnic Group: Odanak
    Population: 457
    Language(s): Abenaki, French
    Religion:
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  •   Odawa
    Ethnic Group: Odawa
    Population: 15,000
    Language(s): Ojibwe (Ottawa dialect), English
    Related Ethnic Group(s):
    • Sauk
    • Wampanoag
    • Potawatomi
    • Ojibwa (Chippewa)
    Religion: Traditional Religion, Midewiwin, Christianity, Animism
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  •   Ofayé
    Ethnic Group: Ofayé
    Population: 61 (Crevels 2012)
    Language(s): Ofayé, Portuguese, Kaiwá
    Religion: Christianity
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  •   Ogaden
    Ethnic Group: Ogaden
    Population:
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    Religion: Islam (Sunni, Sufism)
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  •   Ogan Besemah
    Ethnic Group: Ogan Besemah
    Population: 740,000
    Language(s): Central Malay
    Religion: Islam
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  •   Ogea
    Ethnic Group: Ogea
    Population: 2,210 (2003 SIL)
    Language(s): Ogea
    Religion: Christianity
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  •   Oglala
    Ethnic Group: Oglala
    Population: 46,855 (2013)
    Language(s): English, Lakota
    Related Ethnic Group(s):
    • Dakota
    • Lakota
    Religion: Christianity, Sun Dance, Traditional Tribal Religion, Native American Church
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    Photo By: Oglala Sioux Tribe - OST, https://www.facebook.com/THEOGLALANATION/
  •   Ogoni
    Ethnic Group: Ogoni
    Population: 1,500,000
    Language(s): Ogoni languages
    Related Ethnic Group(s):
    • Igbo
    • Anaang
    • Ekoi
    • Ibibio
    • Efik
    • Ijaw
    Religion: Christianity, Traditional Beliefs
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  •   Ohkay Owingeh
    Ethnic Group: Ohkay Owingeh
    Population: 6,748
    Language(s): Tewa
    Religion: Traditional, Catholicism
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    Photo By: Mike Spieth, https://www.flickr.com/photos/18582873@N03/1926210082/
  •   Oirat
    Ethnic Group: Oirat
    Population: 638,372
    Language(s): Oirat
    Related Ethnic Group(s):
    • Mongol
    Religion: Tibetan Buddhism, Shamanism
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  •   Oitbi
    Ethnic Group: Oitbi
    Population:
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  •   Ojibwa (Chippewa)
    Ethnic Group: Ojibwa (Chippewa)
    Population: 170,742 (United States, 2010)
    Language(s): English, Ojibwe, French
    Related Ethnic Group(s):
    • Powhatan
    • Potawatomi
    • Nanticoke
    • Mi’kmaq
    • Odawa
    • Sauk
    • Roanoke
    Religion: Catholicism, Midewiwin, Methodism
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  •   Ojibways of Onigaming First Nation
    Ethnic Group: Ojibways of Onigaming First Nation
    Population: 737
    Language(s):
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    Photo By: Ojibways of Onigaming, http://www.onigaming.ca/
  •   Okanagan (Okanogan)
    Ethnic Group: Okanagan (Okanogan)
    Population: 5,180 (FPCC 2014)
    Language(s): English, Okanagan
    Related Ethnic Group(s):
    • Wenatchi
    • Nez Perce
    • Colville
    • Entiat
    • Methow
    • Nespelem
    • Sanpoil
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  •   Okande
    Ethnic Group: Okande
    Population: 700
    Language(s): Kande
    Religion: Traditional Religion
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  •   Okanese
    Ethnic Group: Okanese
    Population: 700
    Language(s): Cree language
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    Photo By: CBC News, http://www.cbc.ca/news/canada/
  •   Okiek (Akiek)
    Ethnic Group: Okiek (Akiek)
    Population: 79,250 (Ethnologue)
    Language(s): Okiek, Maasai, Gikuyu, Kipsigis, Swahili, English
    Religion: Christianity
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  •   Ola
    Ethnic Group: Ola
    Population:
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  •   Olkolo
    Ethnic Group: Olkolo
    Population: 5 (2006 AUSTLANG)
    Language(s): Olkol
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  •   Olongbura
    Ethnic Group: Olongbura
    Population: 7 (2006 AUSTLANG)
    Language(s): Batyala
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  •   Olu’bo
    Ethnic Group: Olu’bo
    Population: 31,700
    Language(s): Olu'bo
    Religion: Islam
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  •   Omagua (Cambeba)
    Ethnic Group: Omagua (Cambeba)
    Population: 350 (Crevels 2012)
    Language(s): Spanish, Omagua (Cambeba), Kukama-Kukamiria
    Religion: Ethnic Religions
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  •   Omaguaca
    Ethnic Group: Omaguaca
    Population: 7,400
    Language(s): Spanish
    Religion: Christianity
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  •   Omaha
    Ethnic Group: Omaha
    Population: 5,194
    Language(s): English, Omaha-Ponca
    Related Ethnic Group(s):
    • Ponca
    • Osage
    • Iowa Tribe of Oklahoma
    • Otoe
    Religion: Christianity
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  •   Omani
    Ethnic Group: Omani
    Population: 2,500,000
    Language(s): Omani Arabic, Balochi, Jibbali, Mehri, Swahili, Persian, Kumzari
    Related Ethnic Group(s):
    • Bravanese
    Religion: Sunni Islam, Shiite, Ibadi
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    Photo By: Frans Sellies, https://www.flickr.com/photos/26849514@N06/
  •   Omotik
    Ethnic Group: Omotik
    Population: 42,000
    Language(s): Omotik, Maasai
    Religion: Traditional Religion
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  •   Ona (Selknam)
    Ethnic Group: Ona (Selknam)
    Population: 2,761
    Language(s): Ona (Selk'nam), Spanish
    Related Ethnic Group(s):
    • Tehuelche
    • Haush
    Religion: Christianity, Animism
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  •   Onabasulu
    Ethnic Group: Onabasulu
    Population: 1,000
    Language(s): Onabasulu, English, Edolo, Huli
    Religion: Christianity
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  •   Ondo
    Ethnic Group: Ondo
    Population: 3,440,000 (2006 census)
    Language(s): Ondo
    Religion: Traditional Religion, Christianity, Islam
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    Photo By: Trip Down Memory Lane, https://kwekudee-tripdownmemorylane.blogspot.com/
  •   Oneida
    Ethnic Group: Oneida
    Population: 1,000
    Language(s): Oneida, English
    Related Ethnic Group(s):
    • Onondaga
    • Tuscarora
    • Seneca Nations of Indians
    • Cayuga
    • Mohawk
    Religion: Christianity, Longhouse, Kahni'kwi'io, Kai'hwi'io, Handsome Lake
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    Photo By: Oneida Indian Nation, https://www.facebook.com/OneidaIndianNationNY/
  •   Onge
    Ethnic Group: Onge
    Population: 101 2011 census
    Language(s): Onge
    Related Ethnic Group(s):
    • Jarawa
    • Sentinelese
    Religion: Traditional Religion
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  •   Ongkarango
    Ethnic Group: Ongkarango
    Population:
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  •   Ongkomi
    Ethnic Group: Ongkomi
    Population:
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  •   Ongona
    Ethnic Group: Ongona
    Population:
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  •   Onondaga
    Ethnic Group: Onondaga
    Population: 800,000
    Language(s): Onondaga, English, Mohawk, Oneida
    Related Ethnic Group(s):
    • Oneida
    • Mohawk
    • Tuscarora
    • Seneca Nations of Indians
    • Cayuga
    Religion: Kanoh'hon'io, Kahni'kwi'io, Handsome Lake, Longhouse, Gai'hwi:io
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    Photo By: Onondaga Nation, http://www.onondaganation.org/
  •   Ontonagon Chippewa
    Ethnic Group: Ontonagon Chippewa
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  •   Opaskwayak Cree
    Ethnic Group: Opaskwayak Cree
    Population:
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  •   Opata
    Ethnic Group: Opata
    Population: Unknown
    Language(s): Spanish, Opata (Extinct)
    Related Ethnic Group(s):
    • Chichimeca Jonaz
    Religion: Indigenous Religion
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  •   Opau
    Ethnic Group: Opau
    Population:
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  •   Opaye Shavante
    Ethnic Group: Opaye Shavante
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  •   Opolyans
    Ethnic Group: Opolyans
    Population:
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  •   Orambul
    Ethnic Group: Orambul
    Population:
    Language(s): Bayali / Orambul (Extinct)
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  •   Orang Asli
    Ethnic Group: Orang Asli
    Population: 205,000
    Language(s): Aslian languages, Aboriginal Malay
    Related Ethnic Group(s):
    • Semang
    • Maniq
    • Senoi
    Religion: Christianity, Islam, Animism
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  •   Orang Kanaq
    Ethnic Group: Orang Kanaq
    Population: 100
    Language(s): Orang Kanaq, Malay
    Related Ethnic Group(s):
    • Orang Kuala (Duano’)
    • Jakun
    Religion: Islam, Christianity
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    Photo By: broc8, https://www.flickr.com/photos/rbrockett/
  •   Orang Kuala (Duano’)
    Ethnic Group: Orang Kuala (Duano’)
    Population: 19,000 (2006)
    Language(s): Duano', Malay, Indonesian
    Related Ethnic Group(s):
    • Moken
    • Urak Lawoi
    Religion: Animism, Sunni Islam
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  •   Orang Palu’e
    Ethnic Group: Orang Palu’e
    Population: 14,000
    Language(s): Sara Lu'a
    Religion: Traditional Religion
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  •   Orang Seletar
    Ethnic Group: Orang Seletar
    Population: 1,250 (2008 JHEOA)
    Language(s): Orang Seletar, Malay
    Related Ethnic Group(s):
    • Orang Kanaq
    • Temuan
    • Orang Kuala (Duano’)
    • Jakun
    Religion: Animism, Christianity, Islam
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    Photo By: Adznee Abas, https://www.flickr.com/photos/adznee165/
  •   Orang Sungai
    Ethnic Group: Orang Sungai
    Population: 1,400
    Language(s): Sungai, Malay
    Related Ethnic Group(s):
    • Kadazan
    • Dusun
    • Tambanuo
    Religion: Christianity, Animism, Islam
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    Photo By: Sabah Association of Bangsa Sungai, https://sabasofficial.wordpress.com/tag/orang-sungai/
  •   Oraon
    Ethnic Group: Oraon
    Population: 1,834,000
    Language(s): Kurukh, Brahia, Paharia
    Religion: Christianity
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    Photo By: Oraon Image, https://www.pinterest.com/pin/303852306083207114/
  •   Orcadian
    Ethnic Group: Orcadian
    Population: 20,000
    Language(s): Insular Scots, Norn, Pictish, Scottish English
    Related Ethnic Group(s):
    • Scottish
    • Norwegian
    • Faroese
    • Icelander
    Religion: Presbyterianism
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  •   Ordos Mongol
    Ethnic Group: Ordos Mongol
    Population: 123,000
    Language(s): Ordos dialect
    Religion: Tibetan Buddhism, Traditional Religion
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  •   Orejon
    Ethnic Group: Orejon
    Population:
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  •   Oremano
    Ethnic Group: Oremano
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  •   Oriwa
    Ethnic Group: Oriwa
    Population:
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  •   Oriya
    Ethnic Group: Oriya
    Population: 38,017,446
    Language(s): Oriya (Odia)
    Related Ethnic Group(s):
    • Assamese
    • Awadhi
    • Bhojpuri
    • Marwari
    • Sindhi
    • Punjabi
    Religion: Christianity, Buddhism, Islam, Hinduism, Jainism
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  •   Orochi
    Ethnic Group: Orochi
    Population: 600 (2010 census)
    Language(s): Oroch, Russian
    Related Ethnic Group(s):
    • Orok
    • Udege
    • Ainu
    • Itelmen
    • Even
    • Ulch
    Religion: Russian Orthodoxy, Shamanism, Buddhism
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    Photo By: Great Turanian Spirit, https://www.facebook.com/521384767889599/photos/
  •   Oroha
    Ethnic Group: Oroha
    Population: 38 (SIL, 1999)
    Language(s): Oroha (Endangered), Sa'a, English
    Religion: Traditional Religion, Christianity
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  •   Orok
    Ethnic Group: Orok
    Population: 300 (2010 census
    Language(s): Orok, Russian
    Related Ethnic Group(s):
    • Nanai
    • Udege
    • Orochi
    • Ainu
    • Koryak
    • Nivkh
    • Ulch
    • Itelmen
    Religion: Russian Orthodox Christianity, Shamanism
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  •   Orokaiva
    Ethnic Group: Orokaiva
    Population: 35,000 (2000 census)
    Language(s): Orokaiva
    Religion: Christianity, Traditional Religion
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  •   Oromo
    Ethnic Group: Oromo
    Population: 17,465,900
    Language(s): Oromo, Tigrinya, Amharic
    Related Ethnic Group(s):
    • Beja
    • Somali
    • Afar
    • Sidama
    • Amhara
    • Tigre
    • Agaw
    Religion: Islam, Protestant, Christian (Ethiopian Orthodox)
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    Photo By: Anthony Pappone, https://www.flickr.com/photos/ronnyreportage/
  •   Oromocto
    Ethnic Group: Oromocto
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  •   Oroqen
    Ethnic Group: Oroqen
    Population: 8,200 (2000 census)
    Language(s): Oroqen
    Related Ethnic Group(s):
    • Evenk
    Religion: Buddhism, Shamanism
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    Photo By: Bin im Garten (Saamiblog), https://www.flickr.com/photos/28772513@N07/7028529477/
  •   Osage
    Ethnic Group: Osage
    Population: 13,307
    Language(s): Osage, English
    Related Ethnic Group(s):
    • Ponca
    • Omaha
    • Quapaw
    • Kansa (Kaw)
    Religion: Native American Church, Roman Catholicism, Traditional Tribal religion
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  •   Osing
    Ethnic Group: Osing
    Population: 300,000 (Ethnologue, 2000 census)
    Language(s): Osing
    Related Ethnic Group(s):
    • Cirebonese
    • Tenggerese
    • Balinese
    • Banyumasan
    Religion: Islam, Hinduism, Christianity
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  •   Osprey Cherokee
    Ethnic Group: Osprey Cherokee
    Population:
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  •   Ossetian
    Ethnic Group: Ossetian
    Population: 750,000
    Language(s): Ossetian, Russian, Georgian
    Related Ethnic Group(s):
    • Mingrelian
    • Laz
    • Svan
    • Avar
    • Akhvakh
    • Chamalal
    Religion: Orthodox Christian
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    Photo By: Costume Planet, costumeplanet.blogspot.com
  •   Ossetian people in Turkey
    Ethnic Group: Ossetian people in Turkey
    Population: 39,000
    Language(s): Ossetic
    Religion: Islam
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  •   Ostyak
    Ethnic Group: Ostyak
    Population:
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  •   Ot Danum
    Ethnic Group: Ot Danum
    Population: 78,800 (2007 SIL)
    Language(s): Ot Danum
    Related Ethnic Group(s):
    • Ma’anyan
    • Ngaju
    • Dusun
    Religion: Kaharingan, Christianity
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    Photo By: http://pondokkaryadayakbenuaq.blogspot.com/
  •   Otaibah
    Ethnic Group: Otaibah
    Population:
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  •   Otati
    Ethnic Group: Otati
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  •   Otavalo
    Ethnic Group: Otavalo
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  •   Otoe
    Ethnic Group: Otoe
    Population: 3,000 (including Missouria)
    Language(s): English, Chiwere
    Related Ethnic Group(s):
    • Omaha
    • Missouria
    • Iowa Tribe of Oklahoma
    Religion: Christianity, Native American Church
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    Photo By: First People, http://www.firstpeople.us
  •   Otomac
    Ethnic Group: Otomac
    Population: Extinct
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  •   Otomi
    Ethnic Group: Otomi
    Population: more than 300,000
    Language(s): Otomi, Spanish
    Related Ethnic Group(s):
    • Pame
    • Mazahua
    Religion: Roman Catholic, Traditional Religion, Judaism, Protestant
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    Photo By: Karen Elwell, https://www.flickr.com/photos/citlali/
  •   Otuke
    Ethnic Group: Otuke
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  •   Ouachita
    Ethnic Group: Ouachita
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  •   Ouarsenis
    Ethnic Group: Ouarsenis
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  •   Ouchestigouek
    Ethnic Group: Ouchestigouek
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  •   Ouiba
    Ethnic Group: Ouiba
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  •   Oujé-Bougoumou Cree Nation
    Ethnic Group: Oujé-Bougoumou Cree Nation
    Population: 875
    Language(s): Cree, English, French
    Religion: Christianity
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    Photo By: Oujé-Bougoumou Cree Nation, http://www.ouje.ca/
  •   Oulad Djerir
    Ethnic Group: Oulad Djerir
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  •   Oumamiouek
    Ethnic Group: Oumamiouek
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  •   Ovambo (Ambo)
    Ethnic Group: Ovambo (Ambo)
    Population: 1,600,000
    Language(s): Oshiwambo
    Related Ethnic Group(s):
    • Shona
    • Luba
    • Zulu
    • Tiv
    • Sukuma
    • Kikuyu
    Religion: Lutheran
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  •   Ovimbundu
    Ethnic Group: Ovimbundu
    Population: 6,000,000 (2012 World Factbook)
    Language(s): Umbundu, Portuguese
    Related Ethnic Group(s):
    • Zulu
    • Shona
    • Sukuma
    • Tiv
    Religion: Christianity, African Traditional Religion
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  •   Owambo
    Ethnic Group: Owambo
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  •   Oy
    Ethnic Group: Oy
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  •   Oyana
    Ethnic Group: Oyana
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  •   Ozette
    Ethnic Group: Ozette
    Population:
    Language(s): Makah language, English
    Related Ethnic Group(s):
    • Makah
    Religion: Traditional Religion
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Ethnic Groups
  •   O Du
  •   O-Chi-Chak-Ko-Sipi First Nation
  •   O’Chiese First Nation
  •   Obedjiwan
  •   Ocaina
  •   Occaneechi
  •   Occitan
  •   Ochapowace
  •   Odanak
  •   Odawa
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  •   Ogaden
  •   Ogan Besemah
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  •   Oglala
  •   Ogoni
  •   Ohkay Owingeh
  •   Oirat
  •   Oitbi
  •   Ojibwa (Chippewa)
  •   Ojibways of Onigaming First Nation
  •   Okanagan (Okanogan)
  •   Okande
  •   Okanese
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  •   Ola
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  •   Omagua (Cambeba)
  •   Omaguaca
  •   Omaha
  •   Omani
  •   Omotik
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  •   Onabasulu
  •   Ondo
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  •   Ongkomi
  •   Ongona
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  •   Ontonagon Chippewa
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  •   Oraon
  •   Orcadian
  •   Ordos Mongol
  •   Orejon
  •   Oremano
  •   Oriwa
  •   Oriya
  •   Orochi
  •   Oroha
  •   Orok
  •   Orokaiva
  •   Oromo
  •   Oromocto
  •   Oroqen
  •   Osage
  •   Osing
  •   Osprey Cherokee
  •   Ossetian
  •   Ossetian people in Turkey
  •   Ostyak
  •   Ot Danum
  •   Otaibah
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  •   Otomac
  •   Otomi
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  •   Ouchestigouek
  •   Ouiba
  •   Oujé-Bougoumou Cree Nation
  •   Oulad Djerir
  •   Oumamiouek
  •   Ovambo (Ambo)
  •   Ovimbundu
  •   Owambo
  •   Oy
  •   Oyana
  •   Ozette
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