Unieszyno was formerly part of the German Empire. In the German Empire, the place was called Wunneschin, Groß.
The place is now called Unieszyno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Wunneschin, Groß | German Empire | Lauenburg i.Pom. | 1939 |
| Unieszyno | Under Polish administration | Lębork | 1945 |
| Unieszyno | Poland | Słupsk | 1992 |