The origins of the name Aaniiih, (meaning the White Clay People) is unclear. Many believe that they painted themselves with white clay found along the Saskatchewan River for ceremony, like the northern Arapaho. Early French fur trappers and traders named this tribe Gros Ventre. Other tribes in the area referred to them as the " Water Falls People". Lacking a common language, they used physical signs to indicate some terms. The sign for waterfall was the passing of the hands over the stomach. The French traders interpreted this as meaning "big belly" and called the Aaniiih the Gros Ventre, meaning "big belly" in the French language.