Kin Groupe and Descent. Descent groups trace their origin to an eponymous named couple, brother-sister pair, or man with several wives. Each group has a history describing their arrival in the Murik Lakes from elsewhere in the region. These are named, corporate groups in which descent is traced ambilineally. Giving names to individuals is an important way of indicating group membership (s). Individual claims to membership are activated by participating in cooperative enterprises and ritual work. Groups compete for members by sponsoring life-cycle rituals on behalf of individuals, especially firstborns. Leadership within the descent group is validated by organizing trade activities, rituals, feasts, and dance performance.
Kinship Terminology. Terminology is of the Hawaiian type with special terms for mother's brother and father's sister.