Dieffenbach-au-Val was formerly part of the German Empire. In the German Empire, the place was called Diefenbach.
The place is now called Dieffenbach-au-Val and belongs to France.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Diefenbach | German Empire | Schlettstadt | before the Versailles Treaty |
| Dieffenbach | France | Bas-Rhin | after the Versailles Treaty |
| Diefenbach | German Empire | Schlettstadt | 1940 |
| Dieffenbach-au-Val | France | Bas-Rhin | 1945 |
| Dieffenbach-au-Val | France | Bas-Rhin | 1993 |