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".
Breast-shaped hill
The name "Mamucium" that gave origin to the name of the city of Manchester is thought to derive from the Celtic language meaning "breast-shaped hill", referring to the sandstone bluff on which the fort stood; this later evolved into the name Manchester.