Blauenschlag was formerly part of the German Empire. In the German Empire, the place was called Blauenschlag.
The place is now called Blažejov and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Blauenschlag | Austro-Hungary | Neuhaus | before the Treaty of Saint-Germain |
| Blažejov | Austro-Hungary | Neuhaus | before the Treaty of Saint-Germain |
| Blažejov | Czechoslovakia | Jindřichův Hradec | after the Treaty of Saint-Germain |
| Blauenschlag | Czechoslovakia | Jindřichův Hradec | after the Treaty of Saint-Germain |
| Blauenschlag | German Empire | Neubistritz | 1938 |
| Blažejov | Czechoslovakia | Jindřichův Hradec | 1945 |
| Blažejov | Czechoslovakia | Jindřichův Hradec | 1992 |
| Blažejov | Czech Republic | Jindřichův Hradec | 1993 |