Prince Jon was a world renowned Viking warrior who lived in Scandinavia during the early in the 10th Century.
History
After standing on a frozen battlefield as the last survivor of a long forgotten war, Prince Jon met and fell in love with a Valkyrie. Odin, king of the Norse Gods discovered the affair and banished Jon from Valhalla, saying that the only way he could return to be reunited with his love was to die a heroic death. However, Odin gifted the Viking Prince with invulnerability from harm by metal, wood, fire and water, thereby preventing him from dying in combat.
After many years traveling the world, searching for his heroic death The Viking Prince gradually grew distant from humanity and eventually tired of the endless battles and so he sailed into the frozen north, where he passed out of living memory.
More than a thousand years later, his body is discovered inside his ship, frozen in the side of a melting glacier. The Legion of Doom learned of the Viking Prince's rediscovery and sought to capture his body to learn the secret of invulnerability. The Justice League managed to thwart this plan. Wonder Woman decides to give the Prince a proper funeral according to tradition and sent his body into the Sun.