Polaun was formerly part of the German Empire. In the German Empire, the place was called Polaun.
The place is now called Polubný and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Polaun | Austro-Hungary | Gablonz a. d. Neiße | before the Treaty of Saint-Germain |
| Polubny | Austro-Hungary | Gablonz a. d. Neiße | before the Treaty of Saint-Germain |
| Polubný | Czechoslovakia | Jablonec nad Nisou | after the Treaty of Saint-Germain |
| Polaun | Czechoslovakia | Jablonec nad Nisou | after the Treaty of Saint-Germain |
| Polaun | German Empire | Gablonz a. d. Neiße | 1938 |
| Polubný | Czechoslovakia | Jablonec nad Nisou | 1945 |
| Polubný | Czechoslovakia | Jablonec nad Nisou | 1992 |
| Polubný | Czech Republic | Jablonec nad Nisou | 1993 |