Moiety

In the anthropological study of kinship, a moiety is a descent group that coexists with only one other descent group within a society. In such cases the community usually has unilineal descent, so that any individual belongs to one of the two moiety groups by birth, and all marriages take place between members of opposite moieties. A moiety system is an exogamous clan system built from only two clans. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/