This chapter shows how, working in layers, detect early name set, discriminate from the incomers of the next 300 years, up to the data strong point of Carolinian times, and subsequently isolate the migrants of the industrial period and of recent time. Result of research names and naming taken several forms. The hand the literature about the mechanisms different names arose, for P. H. Reaney The Origin of English Surnames and R. A. McKinley a History of British Surnames. The evolution of the modern name set was due to a great variety of factors. First of all, the survival of the rarer names was very chancy, since the original name holders might have been few in number, or perhaps single individuals. Name patterns in the population too used to determine geographical origin, or the period before the availability of the census books, and provided certain aspects of naming in England are understood.