The Four Sons of Aymon (French: [Les] Quatre fils Aymon, Dutch: De Vier Heemskinderen, German: Die Vier Haimonskinder), sometimes also referred to as Renaud de Montauban (after its main character) is a medieval tale spun around the four sons of Duke Aymon: the knight Renaud de Montauban (also spelled Renaut, Renault, Italian: Rinaldo di Montalbano, Dutch: Reinout van Montalbaen), his brothers Guichard, Allard and Richardet, their magical horse Bayard (Italian: Baiardo), their adventures and revolt against the emperor Charlemagne. The story had a European success and echoes of the story are still found today in certain folklore traditions.