Arapahoe Tribe
Arapahoe Indians, Arapaho Tribe, Arapaho Indians. An important Plains tribe of the great Algonquian family, closely associated with the Cheyenne for at least a century past. They call themselves Iñunaina, about equivalent to ‘our people.’ The name by which they are commonly known is of uncertain derivation, but it may possibly be, as Dunbar suggests, from the Pawnee tirapihu or larapihu, ‘trader.’ By the Sioux and Cheyenne they are called ” Blue-sky men ” or “Cloud men,” the reason for which is unknown.