Kin Groups and Descent. The core kin group is the bilateral kindred. Within this group the household and relationships of the first degree (parents, siblings, and children) are the most important. Second-degree relationships (grandparents, uncles, aunts, first cousins, nieces, nephews, and grandchildren) are also important as are those of the third degree (siblings of grandparents and children of first cousins and of nieces and nephews). Both consanguineal and affinal links are important in tracing one's relationships to others in the locality and expressing "community solidarity," reciprocal obligations, and needs. Ideally, people should remain loyal; Otherwise, they risk social isolation. Interconnections between kindreds tend to bind everyone together into larger groups of "kin," which form the bases for local identity. Older Individuals can often trace interrelationships between everyone in a locality back 130-150 years. The kindred also influences membership in religious groups, political affiliation, marriage alliances, and general social interaction. Marriage between kin closer than second cousins is rare. The oldest son in a family is commonly named after the paternal grandfather, the second son after the father, and the first and second daughters after the grandmothers.
Kinship Terminology. Welsh kinship terminology follows a bifurcate-merging pattern as among the English. In some areas there are differing terms for consanguineal as opposed to affinal relatives. Personal or individual preferences often lead to stressing one side of the family as opposed to the other. Lifelong nicknames based upon negative or humorous traits are common.