Masłowiec was formerly part of the German Empire. In the German Empire, the place was called Maßlisch Hammer.
The place is now called Masłowiec and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Maßlisch Hammer | German Empire | Trebnitz | 1939 |
| Masłowiec | Under Polish administration | Trzebnica | 1945 |
| Masłowiec | Poland | Wrocław | 1992 |