duchy
noun
- territory, fief, or domain ruled by a duke or duchess
Wiktionary
Pronunciation: /ˈdʌt͡ʃi/
noun
Etymology: From Middle English duche, from Anglo-Norman duché, from Old French duc, or from Medieval Latin ducātus, from Latin dux. Doublet of ducat.
- A dominion or region ruled by a duke or duchess.