In South America there are several tribal groups whose name is spelled with an X, using historic Spanish or Portuguese pronunciation. An example is the Xavante tribe of Brazil, where the X stands for the sound sh (so it's Sha-van-tay). There is no Canadian or United States tribe whose name starts with the letter X, but in Mexico there are the Xixime and Ximpece; in Central America are the Xinca; in Colombia there are the Xiriguana; in Brazil the Xavante, Xerente and Xucuru. In most cases the x represents Spanish or Portuguese "sh".
This is a partial list. The numbers after some names mean the number of known languages in that family. If we were doing that for European languages one example would be Romance (23),( although the exact number depends on what you count as understandable or not). This includes, Italian, French, Romanian, Spanish and many others. In the Na-Dene there are as an example there are Northern, Southern and Pacific Coast sub families. In the Southern there are 7 languages. Some have a lot of word similar like Spanish and Italian other s are more distant. In North America there are thought to have been about 296 spoken (or formerly spoken) indigenous languages north of Mexico, 269 of which are grouped into 29 families (the remaining 27 languages are either isolates or unclassified) Here one list, there are about 45 others that we don't know enough about to know if they were their own language or what they were related to. That list follows this one. Adai Algic (30) Alsean (2) Atakapa Beothuk Caddoan (5) Cayuse Chimakuan (2) Chimariko Chinookan (3) Chitimacha Chumashan (6) Coahuilteco Comecrudan (United States & Mexico) (3) Coosan (2) Cotoname Eskimo-Aleut (7) Esselen Haida Iroquoian (11) Kalapuyan (3) Karankawa Karuk Keresan (2) Kutenai Maiduan (4) Muskogean (9) Na-Dené (United States, Canada & Mexico) (39) Natchez Palaihnihan (2) Plateau Penutian (4) (also known as Shahapwailutan) Pomoan (7) Salinan Salishan (23) Shastan (4) Siouan-Catawban (19) Siuslaw Solano Takelma Tanoan (7) Timucua Tonkawa Tsimshianic (2) Tunica Utian (15) (also known as Miwok-Costanoan) Uto-Aztecan (33) Wakashan (7) Wappo Washo Wintuan (4) Yana Yokutsan (3) Yuchi Yuki Yuman (11) Zuni List of languages we aren't sure about: Eyeish Coree Sewee Cusabo Shoccoree-Eno Pascagoula Quinipissa Opelousa Pedee Bayogoula Okelousa Congaree Winyaw Santee Okchai-Chacato Tequesta Guale Sanan Yamasee Akokisa Avoye Tocobaga Houma Neusiok Ubate Cape Fear Pensacola Bidai Wateree Mobile Michigamea Pakana Saxapahaw Keyauwee Guachichil Suma-Jumano Huite Concho Jova Acaxee Xixime (Jijime) Zacatec Tahue Guasave Toboso
Some Native American languages include Algonquin, Arapaho, Ojibwe, Powhatan, Shawnee, Menomini and Cree. Some additional Native American languages are Etchemin, Kickapoo, Potawatomi, Chinook, Nisgaa, Wintu, and Osage.