Pern was formerly part of the German Empire. In the German Empire, the place was called Pern.
The place is now called Beroun and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Pern | Austro-Hungary | Tepl | before the Treaty of Saint-Germain |
| Beroun | Austro-Hungary | Tepl | before the Treaty of Saint-Germain |
| Perna | Austro-Hungary | Tepl | before the Treaty of Saint-Germain |
| Beroun | Czechoslovakia | Teplá | after the Treaty of Saint-Germain |
| Pern | Czechoslovakia | Teplá | after the Treaty of Saint-Germain |
| Pern | German Empire | Tepl | 1938 |
| Beroun | Czechoslovakia | Toužim | 1945 |
| Beroun | Czechoslovakia | Karlovy Vary | 1992 |
| Beroun | Czech Republic | Karlovy Vary | 1993 |