Rischkau was formerly part of the German Empire. In the German Empire, the place was called Hříškov.
The place is now called Hříškov and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Hřischkow | Austro-Hungary | Laun | before the Treaty of Saint-Germain |
| Hříškov | Austro-Hungary | Laun | before the Treaty of Saint-Germain |
| Hříškov | Czechoslovakia | Louny | after the Treaty of Saint-Germain |
| Rischkau | German Empire | Laun | 1939 |
| Hříškov | German Empire | Laun | 1939 |
| Hříškov | Czechoslovakia | Louny | 1945 |
| Hříškov | Czechoslovakia | Louny | 1992 |
| Hříškov | Czech Republic | Louny | 1993 |