Trębaczów was formerly part of the German Empire. In the German Empire, the place was called Treuweiler.
The place is now called Trębaczów and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Trembatschau | German Empire | Groß-Wartenberg | before the Versailles Treaty |
| Trębaczów | Poland | Kępno | after the Versailles Treaty |
| Trembatschau | German Empire | Kempen (Wartheland) | 1939 |
| Treuweiler | German Empire | Kempen (Wartheland) | 1939 |
| Trębaczów | Poland | Kępno | 1945 |
| Trębaczów | Poland | Kalisz | 1992 |