Pikunis
Originally the Blackfoot/Plains Confederacy consisted of three peoples ("nation", "tribes", "tribal nations") based on kinship and dialect, but all speaking the common language of Blackfoot, one of the Algonquian languages family. The three were the "Piikáni" (historically called "Piegan Blackfeet" in English-language sources), the "Káínaa" (called "Bloods"), and the "Siksikáwa" ("Blackfoot"). They later allied with the unrelated "Tsuu T'ina" ("Sarcee"), who became merged into the Confederacy and, (for a time) with the "Atsina," or A'aninin ("Gros Ventre").