Sudajew was formerly part of the German Empire. In the German Empire, the place was called Sudajew.
The place is now called Sudajew and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sudajew | Russian Empire | Seradz | 1914 |
| Sudajew | Poland | Sieradz | 1921 |
| Sudajew | German Empire | Schieratz | 1939 |
| Sudajew-Ostrów | Poland | Sieradz | 1945 |
| Sudajew-Stefanów | Poland | Sieradz | 1945 |
| Sudajew-Sternia | Poland | Sieradz | 1945 |
| Sudajew | Poland | Sieradz | 1992 |