Because William Addington was the writer’s great, great grandfather, it is of his descendants that much of the subject matter of this history and genealogy is about. Special space is given to his son, Charles Cromwell Addington, who lived to a late age, thus increasing the accessibility of information about this family—which, through two generations, children, and grandchildren, became connected by marriage with many large families. Equally interesting information is given about other branches of the family of Addington of both England and the United States. An index of more than 2,000 names has been added to the reprint of this publication.