Knight of the Shire

Knights of the shire (Latin: milites comitatus) was the formal title for members of parliament (MPs) representing a county constituency in the UK House of Commons, from its origins in the medieval Parliament of England until the Redistribution of Seats Act 1885 ended the practice of each UK county (or shire) forming a single constituency. The corresponding titles for other MPs were burgess in a borough constituency (or citizen if the borough had city status) and baron for a Cinque Ports constituency. Knights of the shire had more prestige than burgesses, and sitting burgesses often stood for election for the shire in the hope of increasing their standing in Parliament.

The name "knight of the shire" originally implied that the representative had to be a knight, and the writ of election referred to a until the 19th century; but by the 14th century men who were not knights were commonly elected. An act of Henry VI stipulated that those eligible for election were knights and "such notable esquires and gentlemen as have estates sufficient to be knights, and by no means of the degree of yeoman".

...
Wikipedia