Kin Groups and Descent. Hidatsa society was divided into eight exogamous matrilineal clans. Within each village these clans functioned as corporate groups that controlled land, arranged marriages, sponsored ceremonies and ritual feasts, and generally served to integrate the population. Clans were aggregated into two moieties. Depopulation, Intermarriage with other tribes and with Whites, and forced acculturation has resulted in a breakdown of the clan system.
Kinship Terminology. Hidatsa aboriginal kinship terminology followed the Crow system.