duchy
territory, fief, or domain ruled by a duke or duchess
Duchy of Mecklenburg
Duchy of the Holy Roman Empire
Saxe-Eisenberg
Middle Age duchy in modern-day Germany
Duchy of Magdeburg
duchy in Central Europe between 1680–1807
Duchy of Franconia
medieval stem duchy in the Kingdom of Germany
Duchy of Bukovina
Austrian crown land (1849–1918)
Duke of Camerino
Papal and Italian title of nobility