This book combines linguistic and historical approaches with the latest techniques of DNA analysis and show the insights these offer for every kind of genealogical research. It focuses on British names, tracing their origins to different parts of the British Isles and Europe and revealing how names often remain concentrated in the districts where they first became established centuries ago. In the process the book casts fresh light on the ancient peopling of the British Isles. The authors consider why some names die out, and how others have spread across the globe. They use recent advances in DNA testing to discover whether particular surnames have a single, dual or multiple origins and whether various forms of a name have a common origin. They show how information from DNA can be combined with historical evidence and techniques to distinguish between individuals with the same name and different names with similar spellings and to identify the name of the same individual or family spelt in various ways in different times and places. Clearly written and illustrated with hundreds of examples, this book will be welcomed by all those engaged in genealogical research, including everyone seeking to discover the histories of their names and families.