Welpin was formerly part of the German Empire. In the German Empire, the place was called Welpen.
The place is now called Wełpin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Welpin | German Empire | Tuchel | before the Versailles Treaty |
| Wełpin | Poland | Tuchola | after the Versailles Treaty |
| Welpen | German Empire | Tuchel | 1939 |
| Wełpin | Poland | Tuchola | 1945 |
| Wełpin | Poland | Bydgoszcz | 1992 |