Gros Ventre was the French name for this Plains people (supposedly because of their big appetites) and Atsina the name their kinsmen the Arapaho bestowed on them, but they call themselves A'aninin, the White Clay People. They share a reservation in Montana with their allies the Assiniboine. The Gros Ventre are occasionally confused with the completely unrelated Hidatsa, whom the French also called Gros Ventre (apparently because the symbols for the two tribes in Plains Indian Sign Language are quite similar). There are about 3000 Gros Ventre today.