Bykoš was formerly part of the German Empire. In the German Empire, the place was called Bykoš.
The place is now called Bykoš and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Bykosch | Austro-Hungary | Hořowitz | before the Treaty of Saint-Germain |
| Bykoš | Austro-Hungary | Hořowitz | before the Treaty of Saint-Germain |
| Bykoš | Czechoslovakia | Hořovice | after the Treaty of Saint-Germain |
| Bikosch | German Empire | Beraun | 1939 |
| Bykoš | German Empire | Beraun | 1939 |
| Bykoš | Czechoslovakia | Beroun | 1945 |
| Bykoš | Czechoslovakia | Beroun | 1992 |
| Bykoš | Czech Republic | Beroun | 1993 |