Janovice was formerly part of the German Empire. In the German Empire, the place was called Johannesgunst.
The place is now abandoned and the area belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Johannesgunst | Austro-Hungary | Hohenelbe | before the Treaty of Saint-Germain |
| Janovice | Czechoslovakia | Vrchlabí | after the Treaty of Saint-Germain |
| Johannesgunst | Czechoslovakia | Vrchlabí | after the Treaty of Saint-Germain |
| Johannesgunst | German Empire | Hohenelbe | 1938 |
| Janovice | Czechoslovakia | Vrchlabí | 1945 |
| - aufgelassen - | Czechoslovakia | Trutnov | 1992 |
| - aufgelassen - | Czech Republic | Trutnov | 1993 |