This name is an anglicization of a French locational name from numerous places called Montigni, eg. Calvados La Manch in Normandy. The name was introduced into Britain with the Norman Invasion of 1066, and derives from the Gallo-Roman personal name 'Montinius'

When you eat dirt for the first time and leave your family to build a shack in the woods

A word derived from the two separate words; 'Mount Me'.

Mountney is also a common last name for lady's with pretty faces and can find humor in anything.