Boso of Provence, Frankish nobleman

Boso of Provence was the first non-Carolingian pretender to the royal throne of West Francia in 879, who failed to achieve wider recognition, being accepted only in Lower Burgundy and Provence, where he ruled as king from 879 to 887. By 882, he had already lost much of his Burgundian domains, and had to retreat to his remaining possessions in Provence. By ancestry, he was a Frankish nobleman of the Bosonid family, who was related to the Carolingian dynasty and previously served as a count in several south-eastern counties of the West Frankish realm.

Nobility is a social class found in many societies that have an aristocracy. It is normally appointed by and ranked immediately below royalty. Nobility has often been an estate of the realm with many exclusive functions and characteristics. The characteristics associated with nobility may constitute substantial advantages over or relative to non-nobles or simply formal functions, and vary by country and by era. Membership in the nobility, including rights and responsibilities, is typically hereditary and patrilineal.