Placenames in Normandy have a variety of origins. Some belong to the common heritage of the Langue d'oïl extension zone in northern France and Belgium; this is called "Pre-Normanic". Others contain Old Norse and Old English male names and toponymic appellatives. These intermingle with Romance male names and place-name elements to create a very specific superstratum, typical of Normandy within the extension zone of the Langue d'oïl. These are sometimes called "Normanic".