Týr
In Norse sources Týr fed the wolf Fenrir. When the gods bound the monster, Týr put his right hand in its mouth as a pledge and lost it when Fenrir found himself tricked. At Ragnarök the dog Garmr is foretold to devour him.
The Romans equated him with Mars, and a third-century inscription names ‘Mars of the Assembly’, linking him with the Germanic thing. His name is the Old English Tiw, and some scholars think he once stood nearer the centre of the Germanic gods.