Radigau was formerly part of the German Empire. In the German Empire, the place was called Radigau.
The place is now called Radechov and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Radigau | Austro-Hungary | Kaaden | before the Treaty of Saint-Germain |
| Radechov | Austro-Hungary | Kaaden | before the Treaty of Saint-Germain |
| Radechov | Czechoslovakia | Kadaň | after the Treaty of Saint-Germain |
| Radigau | Czechoslovakia | Kadaň | after the Treaty of Saint-Germain |
| Radigau | German Empire | Kaaden | 1938 |
| Radechov | Czechoslovakia | Kadaň | 1945 |
| Radechov | Czechoslovakia | Chomutov | 1992 |
| Radechov | Czech Republic | Chomutov | 1993 |