Ober-Losau was formerly part of the German Empire. In the German Empire, the place was called Ober Losau.
The place is now called Horní Lažany and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ober-Losau | Austro-Hungary | Eger | before the Treaty of Saint-Germain |
| Horní Losov | Austro-Hungary | Eger | before the Treaty of Saint-Germain |
| Horní Lažany | Czechoslovakia | Cheb | after the Treaty of Saint-Germain |
| Ober-Losau | Czechoslovakia | Cheb | after the Treaty of Saint-Germain |
| Ober Losau | German Empire | Eger | 1938 |
| Horní Lažany | Czechoslovakia | Cheb | 1945 |
| Horní Lažany | Czechoslovakia | Cheb | 1992 |
| Horní Lažany | Czech Republic | Cheb | 1993 |