Boso of Provence

Boso of Provence (French: Boson; c. 841 – 11 January 887) 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.

In historiography, he is styled as King of Burgundy or King of Provence.