Document Type



Demographic data were collected in an isolated Swiss alpine village for all (228) marriages from 1900-1969, and for all native residents (450) of the village in 1970. Genealogies four to six generations deep provide the base data for an analysis of isonymy, inbreeding, migration, relationship between isonymy and inbreeding coefficient, and prevalence of cousin marriage among isonymous pairs. This type of analysis demonstrates the usefulness of combining ethnographic and demographic data in examining the genetic structure and the potential for evolution of an isolate.