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".
Werneth, Greater Manchester
The name "Werneth" is ancient and derives from a Brittonic personal name identical to the Gaulish "Vernetum", derived from "*verno-" meaning "alder" (Welsh "gwern"). The survival of place-names derived from Celtic personal names is rare in England outside Cornwall. The name is cognate with the place-names Le Vernet and Vernois in France.