Mantvilaičiai was formerly part of the German Empire. In the German Empire, the place was called Mantwillaten.
The place is now called Mantvilaičiai and belongs to Lithuania.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Mantwillaten | German Empire | Tilsit | before the Versailles Treaty |
| Mantvilaičiai | Lithuania | Pajėgiai | after the Versailles Treaty |
| Mantwillaten | German Empire | Tilsit-Ragnit | 1939 |
| Montvilaičiai | Soviet Union | Pagėgiai/Pagegjaj | 1945 |
| Montvilajčjaj | Soviet Union | Pagėgiai/Pagegjaj | 1945 |
| Mantvilaičiai | Lithuania | Šilutė | 1992 |