Mojęcin was formerly part of the German Empire. In the German Empire, the place was called Karlshof.
The place is now called Mojęcin and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Karlshof | German Empire | Löwenberg i. Schles. | 1939 |
| Mojęcin | Under Polish administration | Lwówek Śląski | 1945 |
| Mojęcin | Poland | Jelenia Góra | 1992 |