| Former Duchy / Dukedom | Modern-Day Country | % Correct |
|---|---|---|
| Duchy of Brittany | France | 98%
|
| Duchy of Swabia | Germany | 96%
|
| Duchy of Cornwall | United Kingdom | 96%
|
| Duchy of Bohemia | Czechia | 92%
|
| Duchy of Parma | Italy | 92%
|
| Duchy of Scania | Sweden | 88%
|
| Duchy of Ingria | Russia | 80%
|
| Duchy of Limburg | Belgium | 78%
|
| Duchy of Masovia | Poland | 78%
|
| Duchy of Courland and Semigallia | Latvia | 73%
|
| Duchy of the Archipelago | Greece | 65%
|
| Duchy of Samogitia | Lithuania | 63%
|
| Duchy of Surabaya | Indonesia | 57%
|
| Duchy of Carniola | Slovenia | 57%
|
| Duchy of Tskhumi | Georgia | 27%
|