-Proruby (Lhoty u Potštejna-) was formerly part of the German Empire. In the German Empire, the place was called Proruby.
The place is now called -Proruby (Lhoty u Potštejna-) and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Prorub | Austro-Hungary | Reichenau a. d. Knieschna | before the Treaty of Saint-Germain |
| Proruby | Austro-Hungary | Reichenau a. d. Knieschna | before the Treaty of Saint-Germain |
| Proruby | Czechoslovakia | Rychnov nad Kněžnou | after the Treaty of Saint-Germain |
| Lichtenhain | German Empire | Reichenau an der Knieschna | 1939 |
| Proruby | German Empire | Reichenau an der Knieschna | 1939 |
| Proruby | Czechoslovakia | Rychnov nad Kněžnou | 1945 |
| -Proruby (Lhoty u Potštejna-) | Czechoslovakia | Východní Čechy | 1992 |