The Bosonids were a dynasty of Carolingian era dukes, counts, bishops and knights descended from Boso the Elder and his wife, Engeltrude.
They married into the Carolingian dynasty and produced kings and an emperor of the Frankish Empire.
The first great scion of the dynasty was Boso, count of Arles and of other Burgundian counties in the mid-9th century.
Boso strove throughout the rest of his life to maintain his title in the face of Emperor Charles the Fat.
With this legal basis, he sought to take the place of his Carolingian relatives on the imperial and Italian thrones in 900.