Viking Prince by Joe Kubert

When an amnesiac Viking warrior washed up on the shores of a fishing village in fifth century Iceland, the villagers guessed from his garb that he was royalty, and so they called him Jon, after a legendary prince. Only Thorvald, ruler of a nearby town, realized that he was in fact both royalty and a threat to his own power -- and so, Thorvald plotted to kill Jon. While dodging Thorvald's attempts on his life, Jon also battled giants, sea monsters, witches and more.