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