Over time the newcomers adopted the term "Hakka" to refer to themselves, not least due to the migratory tendencies inherent in their own culture. Although most of the immigrants called Hakkas were Hakka speakers, the term was later used to include various hill ethnicities such as the She and Yao people who were registered as so called "Guest Families" as they migrated with the Hakkas together from the hills. Intermarriages among Hakka and Punti members was extremely rare. Through studies of both Cantonese and Hakka genealogies, some Hakka and Punti people with the same surnames allege that they may have the same ancestors, although their descendants strongly identify with one group to the exclusion of the other.