Janské Údolí was formerly part of the German Empire. In the German Empire, the place was called Johannesthal.
The place is now called Janské Údolí and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Johannesthal | Austro-Hungary | Krumau | before the Treaty of Saint-Germain |
| Janovské Údolí | Austro-Hungary | Krumau | before the Treaty of Saint-Germain |
| Janské Údolí | Czechoslovakia | Český Krumlov | after the Treaty of Saint-Germain |
| Johannesthal | Czechoslovakia | Český Krumlov | after the Treaty of Saint-Germain |
| Johannesthal | German Empire | Krummau/Moldau (Böhm.-Krumau) | 1938 |
| Janské Údolí | Czechoslovakia | Český Krumlov | 1945 |
| Janské Údolí | Czechoslovakia | Český Krumlov | 1992 |
| Janské Údolí | Czech Republic | Český Krumlov | 1993 |