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