Janov was formerly part of the German Empire. In the German Empire, the place was called Jonsdorf.
The place is now called Janov and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jonsdorf | Austro-Hungary | Tetschen | before the Treaty of Saint-Germain |
| Janov | Czechoslovakia | Děčín | after the Treaty of Saint-Germain |
| Jonsdorf | Czechoslovakia | Děčín | after the Treaty of Saint-Germain |
| Jonsdorf | German Empire | Tetschen | 1938 |
| Janov | Czechoslovakia | Děčín | 1945 |
| Janov | Czechoslovakia | Děčín | 1992 |
| Janov | Czech Republic | Děčín | 1993 |