Trnov was formerly part of the German Empire. In the German Empire, the place was called Trnov.
The place is now called Trnov and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Trnow | Austro-Hungary | Neustadt a. d. Mettau | before the Treaty of Saint-Germain |
| Trnov | Austro-Hungary | Neustadt a. d. Mettau | before the Treaty of Saint-Germain |
| Trnov | Czechoslovakia | Nové Město nad Metují | after the Treaty of Saint-Germain |
| Dornhof | German Empire | Neustadt an der Mettau | 1939 |
| Trnov | German Empire | Neustadt an der Mettau | 1939 |
| Trnov | Czechoslovakia | Nové Město nad Metují | 1945 |
| Trnov | Czechoslovakia | Východní Čechy | 1992 |