Part of speech: Noun
the domain controlled by a duke or duchess
Categories: Domain, Demesne, Land
The word "duchy" comes from Latin dux. It started in Medieval Latin ducātus. Then it appeared in Old French duc. Later, people used it in Anglo-Norman duché. After that, it was Middle English duche.
ducat – A related word in the same word family.
Each civilization borrowed this word because they encountered the concept through cultural contact.