Longtime allies of the Cheyenne, the Arapaho (who historically referred to themselves as Inuna-Ina), are an Algonquian-speaking people, based mostly in the Great Plains.

Today, there are two main Arapaho tribes: the Northern Arapaho, who number about 6000 and are concentrated in Wyoming, and the Southern Arapaho, who are united with the Cheyenne into the Cheyenne-Arapaho Nation in Oklahoma, with a combined 11,000 members.

Text adapted from native-languages.org

Apache Arapahoe Arikara Cherokee Cheyenne Chumash Comanche Coos Crow Dineh Havasupai Hawaiian Hoopa Hopi Houma Hualapai Inupiat Kalapuya Karuk Klallam Lakota Luiseno Maidu Mandan Maricopa Miwok Mojave Muscogee Navajo Oglala Ohlone Onondagega Onyotaaka Paiute Passamaquoddy Penobscot Pomo Pueblo Quapaw Quechan