Johannesdorf was formerly part of the German Empire. In the German Empire, the place was called Johannesdorf.
The place is now called Janov (Nový Bor-Janov) and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Johannesdorf | Austro-Hungary | Böhmisch-Leipa | before the Treaty of Saint-Germain |
| Janov | Czechoslovakia | Česká Lípa | after the Treaty of Saint-Germain |
| Johannesdorf | Czechoslovakia | Česká Lípa | after the Treaty of Saint-Germain |
| Johannesdorf | German Empire | Böhmisch Leipa | 1938 |
| Janov | Czechoslovakia | Nový Bor | 1945 |
| Janov (Nový Bor-Janov) | Czechoslovakia | Česká Lípa | 1992 |
| Janov (Nový Bor-Janov) | Czech Republic | Česká Lípa | 1993 |