What does Edmund mean?

Edmund is a soothsayer and prophet, and his name means "know". According to Xu Guinv's account, he participated in the adventure of "Argo Heroes Take golden fleece", and his task was to make divination predictions for the adventure. He predicted that golden fleece's adventure would be successful, but he could not return safely. Nevertheless, he took part in the adventure. When Argo's ship arrived at Marianos, the king there, Lex, warmly received them. It was here that Edmund was killed by a wild boar. Iddas killed the wild boar and avenged him.