Clans that emerged into the fourth way of life or migrated together are considered phratries. Each of the 34 living clans is distinct, but related to other clans within their particular phratries. Special duties are associated with membership in each clan. Each clan has its own history, which explains not only how that clan came to be, but how all Hopi came to be who they are. Each clan is also responsible for hosting ceremonies, and for keeping and honoring certain sacred objects.
Women inherit property through their mother's clan.
Clan membership also determines what ceremonial offices an individual may hold, and certain important offices must rotate between members of different clans. Clan membership even determines how one acts around certain individuals. Hopi are forbidden to marry anyone from their own or related clans, since the entire phratrie is considered family. Hopi must take care of clan members and treat them with great respect. In particular, the mother's clan, which is the primary clan, is owed special respect and responsibilities.