Weser-Rhine Germanic is a proposed group of prehistoric West Germanic dialects which would have been both directly ancestral to Dutch, as well as being a notable substratum influencing West Central German dialects. The term was introduced by the German linguist Friedrich Maurer as a replacement for the older term Istvaeonic, with which it is essentially synonymous. The term Rhine-Weser-Germanic is sometimes preferred.
|Around the Weser and Rhine rivers|
The distribution of the primary Germanic languages in Europe c. AD 1:
North Sea Germanic, or Ingvaeonic
Weser-Rhine Germanic, or Istvaeonic
Elbe Germanic, or Irminonic