Manchester
The name Manchester originates from the Latin name "Mamucium" or its variant "Mancunium" and the citizens are still referred to as Mancunians (). These are generally thought to represent a Latinisation of an original Brittonic name, either from "mamm-" ("breast", in reference to a "breast-like hill") or from "mamma" ("mother", in reference to a local river goddess). Both meanings are preserved in Insular Celtic languages, such as "mam" meaning "breast" in Irish and "mother" in Welsh. The suffix -chester is a survival of Old English "ceaster" and from that "castra" in latin for camp or settlement ("fort; fortified town").
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.