Zembrzus-Mokry Grunt was formerly part of the German Empire. In the German Empire, the place was called Zembrzus Mokry Grunt.
The place is now called Zembrzus-Mokry Grunt and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Zembrzus Mokry Grunt | Russian Empire | Prasnyš | 1914 |
| Zembrzus-Mokry Grunt | Poland | Przasnysz | 1919 |
| Zembrzus Mokry Grunt | German Empire | Praschnitz | 1939 |
| Zembrzus-Mokry Grunt | Poland | Nidzica | 1945 |
| Zembrzus-Mokry Grunt | Poland | Olsztyn | 1992 |