Jazz is a title of European monarchy, which refers to people who have made contributions on the battlefield or obtained land from the king for a special purpose. Only barons are not hereditary. Jazz originated from the feudal system in western Europe, belonging to the second level of the feudal system in western Europe, that is, the big feudal Lord, which can be regarded as a symbol of aristocratic status to some extent.

Classification of aristocratic ranks:

1, Duke

Among the titles of nobility in European countries, the fifth rank above the lowest title is generally translated as "Duke" in Chinese, which is lower than the king or prince and higher than the marquis. It is the highest rank in the title.

2. Marquis

Among the titles of nobility in European countries, the fourth rank above the lowest title of nobility is generally translated as "Marquis" in Chinese, which is lower than Duke and higher than Earl.

3. Earl

Among the titles of nobility in European countries, the third rank above the lowest rank is generally translated as "Earl" in Chinese, lower than Marquis and higher than Viscount.

4. viscount

Viscount is one of the titles of European nobility, generally higher than baron and lower than earl. This title appeared in the UK of 1387.

5. Giants

The last aristocratic rank in European countries is generally called "Baron" in Chinese. In most countries, there are other hereditary titles and positions below the baron, but such status is generally not considered to belong to the nobility.