Trnowan was formerly part of the German Empire. In the German Empire, the place was called Trnowan.
The place is now called Trnovany (Žatec-Trnovany) and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Trnowan | Austro-Hungary | Saaz | before the Treaty of Saint-Germain |
| Trnovany | Austro-Hungary | Saaz | before the Treaty of Saint-Germain |
| Trnovany | Czechoslovakia | Žatec | after the Treaty of Saint-Germain |
| Trnowan | Czechoslovakia | Žatec | after the Treaty of Saint-Germain |
| Trnowan | German Empire | Saaz | 1938 |
| Trnovany | Czechoslovakia | Žatec | 1945 |
| Trnovany (Žatec-Trnovany) | Czechoslovakia | Louny | 1992 |
| Trnovany (Žatec-Trnovany) | Czech Republic | Louny | 1993 |