History of Manchester
According to Oxford University Press, Manchester derived its name from Mamucium, the Roman name for the 1st century-settlement and fort. Mamucium itself is a Latinised form of the Celtic meaning "breast-shaped hill".
Manchester, Washington
Manchester was established in the 1860s and was originally known as Brooklyn, after the borough in New York City. The name was changed to Manchester in 1892 in honor of the city of Manchester, England. Manchester was accessible by land via Shelton/Allyn/Belfair, however, the main population center, Seattle, had only boat access. After a permanent dock was built in 1908, regular steamboat service connected Manchester to nearby communities like Colby, Southworth, and Harper, and to Seattle across the water.