Ráj (Karviná-Ráj) was formerly part of the German Empire. In the German Empire, the place was called Roy.
The place is now called Ráj (Karviná-Ráj) and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Roy | Austro-Hungary | Freistadt/Frysztat, Fryštát | before the Treaty of Saint-Germain |
| Raj | Austro-Hungary | Freistadt/Frysztat, Fryštát | before the Treaty of Saint-Germain |
| Ráj | Austro-Hungary | Freistadt/Frysztat, Fryštát | before the Treaty of Saint-Germain |
| Ráj | Czechoslovakia | Fryštát | after the Treaty of Saint-Germain |
| Raj | Czechoslovakia | Fryštát | after the Treaty of Saint-Germain |
| Raj | Poland | Frysztat/Fryštát | 1938 |
| Roy | German Empire | Teschen | 1939 |
| Ráj | Czechoslovakia | Karviná | 1945 |
| Ráj (Karviná-Ráj) | Czechoslovakia | Karviná | 1992 |
| Ráj (Karviná-Ráj) | Czech Republic | Karviná | 1993 |