exogamy nuclear family endogamy levirate sororate status role monogamy polygamy polygyny polyandry sister exchange cross cousin parallel cousin bridewealth dowry half-marriage family of orientation consanguineal kin family of procreation affinal kin kinship system extended family household neolocal residence patrilocal residence virilocal residence shabano matrilocal residence uxurilocal residence matrifocal residence avunculocal residence bilocal residence ambilocal residence matri-patrilocal residence |