Son of Ner. One of Arthur’s warriors in Welsh legend. As one of his tasks, the warrior Culhwch had to obtain Eiddoel’s help in finding the huntsman Mabon, who happened to be Eiddoel’s cousin. Arthur and his warriors, assisting Culhwch, found Eiddoel held captive in Glini’s fortress. Glini surrendered his prisoner to avoid having his fortress destroyed. Eiddoel then accompanied Arthur’s warriors on the (successful) mission to find Mabon.