NN was formerly part of the German Empire. In the German Empire, the place was called Josefshöhe.
The place is now called NN and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Josefshöhe | Austro-Hungary | Hohenelbe | before the Treaty of Saint-Germain |
| Josefská Výšina | Czechoslovakia | Vrchlabí | after the Treaty of Saint-Germain |
| Josefshöhe | Czechoslovakia | Vrchlabí | after the Treaty of Saint-Germain |
| Josefshöhe | German Empire | Hohenelbe | 1938 |
| Josefská Výšina | Czechoslovakia | Dvůr Králové nad Labem | 1945 |
| Josefská Výšina | Czechoslovakia | Trutnov | 1992 |
| NN | Czech Republic | Trutnov | 1993 |