This is a history and genealogy of the Tallyn family of England and America and the descendants of William R. Tallyn of Stoke Rivers, Devonshire, England. The work is divided in four parts and addresses the period from 1080 to 1979. Part I is concerned with the origins of the Tallyn surname and spans the period between the Norman Conquest in 1080 and the mid-1500's. Part II attempts to forge a genealogical link between William R. Tallyn of Stoke Rivers and early Tallyns of 1700 North Devon, England. Part III is focused on the children and descendants of William R. Tallyn of Stoke Rivers, including those who remained in England and their "American Cousins" who settled in America. Part IV is dedicated to the families of individuals allied with the Tallyn Line by marriage.