... To the French, Renaud de Montauban was a far more popular and national hero than even Roland.
     His name, Raginwald, was common among the Franks, and his origin is suspected to be an Aquitanian Rainaldus,...
... he was in romance a sort of prince of freebooters.  He and his three brothers go by the title of the Quatre Fils Aymon, and he is a sort of chivalrous Robin Hood to the French mind, insomuch that country inns may still be found with the sign of the Quatre Fils Aymon.  In the old French tale, the outlawry of Renaud is accounted for by his having been insulted by the emperor's nephew Berthelot, while playing at chess, and replying with a blow of the golden board that struck out the offender's brains.  He and his brothers then were banished, lived a freebooting life, built the castle of Montalban in Gascony, the king of which country bestowed on him in marriage his daughter Clarice, and finally went on pilgrimage, made his peace with the emperor, turned his hand to the building of Cologne Cathedral, and was killed there by his jealous fellow-workmen. (History of Christian Names, Yonge, 1884)