This is easy, just let people select there North American Indian Tribe:
Abenaki, Achiligonan, Achomawi, Acolapissa, Acquintanacsnak, Acuera, Adai, Ahantchuyuk, Alabama, Alabana, Algonkin, Algonquian Family, Alibamu, Alsea, Amacano, Anadarko, Apache, Apache (Jicarilla), Apaiachicola, Apalachee, Aranama, Arapaho, Arikara, Arosaguntacook, Assiniboin, Atfalati, Athapascan Family, Atquanachuke, Atsina, Atsugewi, Avoyel, Awani, Awatobi, Bannock, Bayogoula, Bayougoula, Bear River Indians, Bellabella, Bellacoola, Beothuk Family, Bidai, Biloxi, Blackfeet (Siksika), Blackfoot, Brotherton, Brulé Sioux, Caddo, Cahinnio, Cahita, Cahuilla, Cajuenche, Calapooya, Calapuya, Calusa, Caparaz, Cape Fear Indians, Capinans, Catawba, Cathlacomatup, Cathlacumup, Cathlakaheckit, Cathlamet, Cathlanahquiah, Cathlapotle, Cathlathlalas, Cayuse, Chactoo, Chakankni, Chakchiuma, Chasta, Chastacosta, Chasta-Soton, Chatot, Chaui, Chaushila, Chehalis, Chelamela, Chemehuevi, Chepenafa, Cheraw, Cherokee, Chesapeake, Chetco, Cheyenne, Chiaha, Chickahominy, Chickasaw, Chilliwack, Chilluckkittequaw, Chilula, Chimakuan Family, Chimakum, Chimariko, Chine, Chinook, Chinookan Family, Chippewa, Chitamacha, Chiwere Family, Choctaw, Choula, Chowanoc, Christanna Indians, Chumash, Chumash Family, Clackama, Clallam, Clatsop, Coahuiltec, Coahuiltecan Tribes, Coanopa, Coaque, Cochimi, Cochiti, Cocopa, Columbians, Colville, Comanche, Conestoga, Congaree, Conoy, Copehan Family, Coree, Costanoan Family, Cowichan, Cowlitz, Coyotero, Cree, Creek, Creeks, Crow, Cuñeil, Cupeño, Cusabo, Dakota, Dakota (Sioux), Dakubetede, Deadose, Delaware, Diegueño, Dotame, Doustioni, Dwamish, Eno, Erie, Esselen, Etchaottine, Etchareottine, Etheneldeli, Eyeish, Fernandeño, Fox, Foxes, Grigra, Gros Ventre, Guacata, Guale, Guasas, Haida, Hainai, Halchidhoma, Hanis, Hathawekela (Absentee Shawnee), Hatteras, Havasupai, Hidatsa, Hitchiti, Hoh, Honniasontkeronon, Hopi, Houma, Housatonic, Huchnon, Huma, Humptulips, Hunkpapa, Hupa, Huron, Hurons, Icaful, Illinois, Iowa, Iroquois, Irquois, Isleta del Sur, Jeags, Jemez, Jicarilla, Juaneño, Kadohadacho, Kalapooian Family, Kalispel, Kamia, Kansa, Karankawa, Karankawan, Karankawan Family, Karok, Kasihta, Kaskaskia, Kaskinampo Kichai, Kato, Kawaiisu, Kawchodinne, Kawia, Keresan Family, Keyauwee, Kickapoo, Kiowa, Kiowa Apache, Kitanemuk, Kitksan, Klallam, Klamath, Klickitat, Koasati, Konomihu, Koroa, Koso, Kosotshe, Koyeti, Kuitsh, Kusan, Kutchin, Kutenai, Kwaiailk, Kwakiutl, Kwalhioqua, Lakmiut, Lassik, Lillooet, Lipan, Lohim, Luiseño, Lumbee, Lummi, Lutuamian Family, Macapiras, Machapunga, Mahican, Maidu, Makah, Malecite, Manahoac, Manahoac Matchotic, Mandan, Manhattan, Manso, Marameg, Maricopa, Mariposan Family, Martha's Vineyard Indians, Mascouten, Mascoutens, Mashpee, Maskegon, Massachuset, Matinecoc, Mattabesic, Mattole, Mdewakanton Sioux, Meherrin, Meits, Menominee, Methow, Metoac, Miami, Michigamea, Michilimackinac, Micmac, Mikasuki, Mishikhwutmetunne, Mission Indians, Missouri, Miwok, Mobile, Moctobi, Modoc, Mohave, Mohawk, Mohegan, Moingwena, Molala, Monacan, Mono, Mono-Paviotso, Montagnais, Moratoc, Moravians, Mosopela, Mosopelea, Muckleshoot, Mugulasha, Muklasa, Multnomah, Munsee, Muskogee, Nabedache, Nacisi, Nacogdoche, Nahane, Nahyssan, Nakotchokutchin, Naltunnetunne, Nanaimo, Nanatsoho, Nanticoke, Napochi, Nappissa, Narragansett, Natchez, Natchitoch, Natchitoches Confederacy, Nauset, Navaho, Neketemeuk, Nemalquinner, Nespelem, Neusiok, Neutral, Neutrals, Nez Percé, NianticNipissing, Nipmuc, Nisqualli, Nongatl, Nooksack, Nooksak, Nootka, Noquet, Nottaway, Ntlakyapamuk, Ocale, Occaneechi, Oçita, Oconee, Ofo, Oglala, Ojibwa, Ojibwe, Okanagon, Okelousa, Okwanuchu, Omaha, Onatheaqua, Onathequa, Oneida, Onondaga, Ontonagon, Opelousa, Osage, Osochi, Oto, Ottawa, Ouachita, Paiute, Paloos, Palouse, Pamlico, Panamint, Papago, Pascagoula, Passamaquoddy, Patiri, Patwin, Pawnee, Pawokti, Pecos, Pedee, Pennacook, Penobscot, Pensacola, Peoria, Pepikokia, Pequawket, Pequot, Piankashaw, Piegan, Pima, Pinal Pueblos, Pinkashaw, Piro Pueblo, Pocomtic, Pohoy, Pomo, Ponca, Poosepatuck, Potawatomi, Powhatan, Pshwanwapam, Pueblo, Pueblos, Puntlatsh, Puyallup, Quahatika, Quapaw, Queets, Quileute, Quinaielt, Quinault, Quinipissa, Saconnet, Salinan, Salish, Salish Family, Saluda, Samish, San Arcs, Sanpoil, Santee, Santiam, Saponi, Sara, Satsop, Saturiba, Sauk, Seechelt, Sekani, Semiahmoo, Seminole, Seneca, Senijextee, Serrano, Sewee, Shahala, Shahaptian Family, Shakori, Shasta, Shastan Family, Shawnee, Shinnecock, Shoshonean Family, Shoshoni, Shuswap, Siksika, Siksika (Blackfeet), Siletz, Sinkakaius, Sinkiuse, Sisseton, Sissipahaw, Siuslaw, Skaddal, Skagit, Skidi Sutaio, Skilloot, Snake, Snohomish, Snoqualmie, Soacatino, Sobaipuri, Songish, Souchitioni, Spokan, Squawmish, Squaxon, Stehtsasamish, Stillaquamish, Stockbridge, Sugeree, Suquamish, Susquehanna, Swallah/Swalash, Swinomish, Tacatacuru, Tachi, Taensa, Tahltan, Taidhapam, Takelma, Tali, Taltushtuntude, Tangipahoa, Tano Pueblo, Taposa, Tatlitkutchin, Tatsanottine, Tawakoni, Tawasa, Tawehash, Tekesta, Tenino, Tequesta, Teton Sioux, Tewa Pueblos, Thlingchadinne, Tigua Pueblo, Tillamook, Timucua Family, Tionontati, Tohome, Tolowa, Tonkawa, Tonto, Tsattine, Tschantoga, Tsilkotin, Tsimshian, Tübatulabal, Tukkuthkutchin, Tulalip, Tunica, Tunxis, Tuscarora, Tuskegee, Tutchonekutchin, Tutelo, Tutuni, Twana, Tyigh, Ucita, Umatilla, Umpqua, Unalachtigo, Unami, Ute, Ute Yampa, Utina, Waccamaw, Waccanaw, Waco, Wailaki, Walapai, Walla Walla, Walpapi, Wampanoag, Wanapam, Wappinger, Wappo, Wasco, Washa, Washo, Wateree, Watlala, Watok, Wauyukma, Waxhaw, Wea, Weanoc, Weapemeoc, Wenatchee, Wenrohronon, Whilkut, Wichita, Winnebago, Wintu, Wintun, Winyaw, Wishram, Wiyot/Wiyat, Woccon, Wyandot, Wynoochee, Yahi, Yahuskin, Yakima, Yakonan, Yamasee, Yamel, Yana, Yaquina, Yatasi, Yavapai, Yazoo, Yodok, Yojuane, Yokuts, Yonkalla, Yscani, Yscanis, Yuchi, Yufera, Yui, Yuki, Yuma, Yuman, Yurok, Yustaga, or Zuñi
Hope I did not leave anyone out...