Waltsch was formerly part of the German Empire. In the German Empire, the place was called Waltsch.
The place is now called Valeč and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Waltsch | Austro-Hungary | Luditz | before the Treaty of Saint-Germain |
| Valeč | Austro-Hungary | Luditz | before the Treaty of Saint-Germain |
| Valeč | Czechoslovakia | Žlutice | after the Treaty of Saint-Germain |
| Waltsch | Czechoslovakia | Žlutice | after the Treaty of Saint-Germain |
| Waltsch | German Empire | Luditz | 1938 |
| Valeč | Czechoslovakia | Podbořany | 1945 |
| Valeč | Czechoslovakia | Karlovy Vary | 1992 |
| Valeč | Czech Republic | Karlovy Vary | 1993 |