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".
Mellor
It is derived from the names of places including Mellor, Greater Manchester and Mellor, Lancashire, which in turn come from ancient words "moel" ‘bare’ + "bre" ‘hill’.