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 Township, York County, Pennsylvania
Manchester Township, deriving its name from the English Duke of Manchester, was laid out in 1742 by Thomas Cookson, a representative of the Lancaster County Courts, because at that time York County was a part of Lancaster County. In the entire township there were 300 inhabitants. The first settlers were English Quakers, with German immigrants settling later and establishing it as an important agricultural community.