Trzecianów was formerly part of the German Empire. In the German Empire, the place was called Dreidorf.
The place is now called Trzecianów and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Trzecianow | German Empire | Koschmin | before the Versailles Treaty |
| Trzecianów | Poland | Krotoszyn | after the Versailles Treaty |
| Dreidorf | German Empire | Gostingen | 1939 |
| Trzecianów | Poland | Gostyń | 1945 |
| Trzecianów | Poland | Leszno | 1992 |