Ernster was formerly part of the German Empire. In the German Empire, the place was called Ernster.
The place is now called Ernster and belongs to Luxembourg.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Ernster | Luxembourg | Luxemburg/Luxembourg | 1939 |
| Ernster | German Empire | Luxemburg | 1940 |
| Ernster | Luxembourg | Luxemburg/Luxembourg | 1945 |
| Ernster | Luxembourg | Luxemburg/Luxembourg | 1993 |