Kin Groups and Descent. Beyond the three-generation household, the significant group is the localized patrilineage, which shares a common surname and traces descent from a common ancestor. There is an elder recognized as the head, and households participate together at ancestral worship ceremonies, weddings, and funerals, with the lineage branch head directing. There are no reliable data on local variations of kinship terminology. The mother's brother plays an important role for his nieces and nephews, from choosing their name and participating in their marriage arrangements to playing a role in their parents' funerals.