Fontoy was formerly part of the German Empire. In the German Empire, the place was called Fentsch.
The place is now called Fontoy and belongs to France.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Fentsch | German Empire | Diedenhofen | before the Versailles Treaty |
| Fontoy | France | Moselle | after the Versailles Treaty |
| Fentsch | German Empire | Diedenhofen | 1940 |
| Fontoy | France | Moselle | 1945 |
| Fontoy | France | Moselle | 1993 |