Marquessate

A marquess (UK /ˈmɑːrkwɪs/;French: marquis, [mɑʁki];Spanish: marqués, Portuguese: marquês) is a nobleman of hereditary rank in various European peerages and in those of some of their former colonies. The term is also used to translate equivalent Asian styles, as in imperial China and Japan.

In Great Britain and Ireland, the correct spelling of the aristocratic title of this rank is marquess (although for aristocratic titles on the European mainland, the French spelling of marquis is often used in English). In Scotland the French spelling is also sometimes used. In Great Britain and Ireland, the title ranks below a duke and above an earl (see "Marquesses in the United Kingdom"). A woman with the rank of a marquess, or the wife of a marquess, is called a marchioness /ˌmɑːrʃəˈnɛs/ in Great Britain and Ireland or a marquise /mɑːrˈkiːz/ elsewhere in Europe. The dignity, rank or position of the title is referred to as a marquisate or marquessate.

...
Wikipedia