Hagen, mythological Germanic hero who plays a variety of roles in a number of northern European legends. In the Nibelungenlied, he appears as a vassal of the Burgundian king Gunther and is a grizzled warrior, loyal and wary. He plays a principal role in the epic as the slayer of Siegfried, who becomes the chief object of hatred and revenge of Siegfried’s widow, Kriemhild. The last of the Nibelungen to be killed, Hagen is decapitated by Kriemhild. The Latin heroic epic Waltharius, in which he is called Hagano, treats of his youth as a hostage and his escape and subsequent attachment to King Guntharius. In Old Norse poems he is Hogni, the brother of Gunnar; both brothers meet their death at the hands of Atli (Attila). See Atli, Lay of.