“Les quatre fils Aymon” was printed in English by William Caxton in 1489, according to Furnivall, and subsequently printed by both Wynken de Worde (1504) and Willyam Copland (1554). Another tale from the Charlemagne cycle, it tells of the adventures of Renaud (later Renaud de Montauban), Alard, Richard, and Guichard, sons of Aimon of Dodone (Dordogne). When Aimon first brings the men to the Emperor’s court, he “likes them and knights, them, and gives Renaud the magic horse Bayard” (Furnivall). When Renaud kills the Emperor’s nephew in a dispute over a chess game, all four men retreat to the forest of Ardennes and are disowned by their father. After a total of fourteen years in exile, they briefly return, unrecognized, to their father’s castle, then go to Spain with their cousin Maugis d’Agremont, a magician, for more adventures.
According to Furnivall, the tale is in two parts, one focusing on the four sons, the other focusing on the magician cousin.
There is a copy of Caxton’s translation / printing at Internet Archive. Furnivall stated that “of Caxton’s edition no perfect copy is known”, so this edition may be missing text.