Peird van Sint-Gillis (Bayard)

The sources attribute Bayard a supernatural origin within the medieval chansons de geste, especially the cycle surrounding The Four Sons of Aymon; beyond being described as of supernatural origin, the supplied materials do not elaborate a specific birth or creation narrative. The regional name Peird van Sint-Gillis (literally 'horse of Saint Gillis') reflects a vernacular form used in later folkloristic contexts, but the provided sources do not supply a fuller etymology or origin tale tied to Saint Gillis.

The supplied sources describe the figure simply as a 'magical bay horse' (a horse of bay coloration). No additional standardized physical details—such as size, markings, tack, or other consistent features—are recorded in the provided materials.

According to the cited summaries, Bayard possesses magical qualities including notable strength and intelligence and the specific supernatural ability to adjust his size to accommodate his riders. He functions as an animate, intelligent mount and companion in epic narratives; beyond size-adjustment, strength, and intelligence the provided sources do not list further powers or feats in detail.