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