Tvrdkov was formerly part of the German Empire. In the German Empire, the place was called Pürkau.
The place is now called Tvrdkov and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Pürkau | Austro-Hungary | Römerstadt | before the Treaty of Saint-Germain |
| Tvrdkov | Austro-Hungary | Römerstadt | before the Treaty of Saint-Germain |
| Tvrdkov | Czechoslovakia | Rýmařov | after the Treaty of Saint-Germain |
| Pürkau | Czechoslovakia | Rýmařov | after the Treaty of Saint-Germain |
| Pürkau | German Empire | Römerstadt | 1938 |
| Tvrdkov | Czechoslovakia | Rýmařov | 1945 |
| Tvrdkov | Czechoslovakia | Bruntál | 1992 |
| Tvrdkov | Czech Republic | Bruntál | 1993 |