Sarnau was formerly part of the German Empire. In the German Empire, the place was called Sarnau.
The place is now called Sarnów and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sarnau | German Empire | Tost-Gleiwitz | 1939 |
| Sarnów | Under Polish administration | Gliwice | 1945 |
| Sarnów | Poland | Katowice | 1992 |