Kin Groups and Descent. Referring to the pre-Jesuit period, some writers, such as Ralph Beals, have suggested the existence of unilineal descent groups among the "Cahita." Currently, however, descent is bilateral and there are no exogamy rules between descent groups.
Kinship Terminology. Kinship terminology is of a Yuman type and similar to the Opata, Tepehuan, and Tarahumara systems from the north of Mexico. The Yaqui system distinguishes relatives on the basis of the speaker's sex and relative age, particularly with respect to the first ascending generation.