The Ponca are a Native American people of the Dhegihan branch of the Siouan-language group. There are two federally recognized Ponca tribes: the Ponca Tribe of Nebraska and the Ponca Tribe of Indians of Oklahoma. Their traditions and historical accounts suggest they originated as a tribe east of the Mississippi River in the Ohio River valley area and migrated west for game and as a result of Iroquois wars. The term Ponca was the name of a clan among the Kansa, Osage, and Quapaws. The meaning of the name is unknown. At first European contact, the Ponca lived around the mouth of the Niobrara River in northern Nebraska.