Pachthof was formerly part of the German Empire. In the German Empire, the place was called Pachthof.
The place is now called Jaworowo II-Pachtarnia and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Jaworowo II-Pachtarnia | Russian Empire | Serpec | 1914 |
| Jaworowo II-Pachtarnia | Poland | Sierpc | 1919 |
| Pachthof | German Empire | Sichelberg | 1939 |
| Pachtarnia | Poland | Sierpc | 1945 |
| Jaworowo II-Pachtarnia | Poland | Płock | 1992 |