Horzenz was formerly part of the German Empire. In the German Empire, the place was called Horzenz.
The place is now called Hořenec and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Horzenz | Austro-Hungary | Dux | before the Treaty of Saint-Germain |
| Hořenec | Austro-Hungary | Dux | before the Treaty of Saint-Germain |
| Hořenec | Czechoslovakia | Duchcov | after the Treaty of Saint-Germain |
| Hořenz | Czechoslovakia | Duchcov | after the Treaty of Saint-Germain |
| Horenz | German Empire | Bilin | 1938 |
| Hořenz | German Empire | Bilin | 1938 |
| Horzenz | German Empire | Bilin | 1938 |
| Hořenec | Czechoslovakia | Bílina | 1945 |
| Hořenec | Czechoslovakia | Louny | 1992 |
| Hořenec | Czech Republic | Louny | 1993 |