Doubi was formerly part of the German Empire. In the German Empire, the place was called Aag.
The place is now called Doubi and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Aag | Austro-Hungary | Eger | before the Treaty of Saint-Germain |
| Doubi | Czechoslovakia | Cheb | after the Treaty of Saint-Germain |
| Aag | Czechoslovakia | Cheb | after the Treaty of Saint-Germain |
| Aag | German Empire | Eger | 1938 |
| Doubí | Czechoslovakia | Cheb | 1945 |
| Doubí | Czechoslovakia | Cheb | 1992 |
| Doubi | Czech Republic | Cheb | 1993 |