Kobylasz was formerly part of the German Empire. In the German Empire, the place was called Stuttwald.
The place is now called Kobylasz and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Kobyllaß | German Empire | Karthaus | before the Versailles Treaty |
| Kobylasz | Poland | Kartuzy | after the Versailles Treaty |
| Stuttwald | German Empire | Karthaus (Westpr.) | 1939 |
| Kobylasz | Poland | Wejherowo | 1945 |
| Kobylasz | Poland | Gdańsk | 1992 |