Aimon, Or Union, the four sons of, Alard, Richard, Guiscard, and Renaud, are among the most illustrious of the warriors and heroes celebrated in the mediaeval romances of chivalry. Aimon is variously reported to have been duke of Dordogna, prince of Ardennes, and provincial governor under Charlemagne. Froissart seriously relates their eventful career, but by the moderns their existence has been transferred from the realm of history to that of poetry. The eldest, Renaud or Roland, is the hero of the "Orlando Furioso " of Ariosto. Their adventures with those of their single horse, famed under the name of Bayard, were probably at first oral traditions in Provence, but have been repeated in various forms in the literature of every European nation.