Potoczek was formerly part of the German Empire. In the German Empire, the place was called Kaschbach.
The place is now called Potoczek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kaschbach | German Empire | Reichenbach (Eulengebirge) | 1939 |
| Potoczek | Under Polish administration | Dzierżoniów | 1945 |
| Potoczek | Poland | Wałbrzych | 1992 |