Gros Ventre

Gros Ventre (French: “big belly”), 2 Native American tribes, the Atsina and the Hidatsa, of the northern Great Plains. The Gros Ventre were named for their sign language, which consisted of hand signals in front of their stomachs. The Atsina, a branch of the Arapaho, live on Montana's Fort Belknap Reservation; the Hidatsa, relatives of the Crow, live on Fort Berthold Reservation in North Dakota.