Unter-Groschum was formerly part of the German Empire. In the German Empire, the place was called Unter Groschum.
The place is now called Dolní Chrášťany and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Unter-Groschum | Austro-Hungary | Prachatitz | before the Treaty of Saint-Germain |
| Dolní Chrášťany | Austro-Hungary | Prachatitz | before the Treaty of Saint-Germain |
| Dolní Chrášťany | Czechoslovakia | Prachatice | after the Treaty of Saint-Germain |
| Unter-Groschum | Czechoslovakia | Prachatice | after the Treaty of Saint-Germain |
| Unter Groschum | German Empire | Krummau/Moldau (Böhm.-Krumau) | 1938 |
| Dolní Chrášťany | Czechoslovakia | Prachatice | 1945 |
| Dolní Chrášťany | Czechoslovakia | Prachatice | 1992 |
| Dolní Chrášťany | Czech Republic | Prachatice | 1993 |