God of war and oaths, the one-handed brave
One of the oldest war gods, keeper of the law of war and the binding force of oaths. He is remembered for a sacrifice all his own: to bind the wolf Fenrir, knowing he would lose his right hand, he still laid it in the wolf’s jaws as a pledge of good faith. When the gods’ deception was exposed, he lost that hand as promised — in the Norse mind, exactly the weight a god of oaths should bear.
Fenrir grew ever larger, and the gods forged a magic ribbon to bind it. The cunning wolf demanded that a god lay a hand in its mouth as surety before it would let itself be bound. The gods looked at one another, and only Tyr held out his right hand. The ribbon tightened, the wolf could not break free, and it bit down — Tyr lost his hand, but secured the gods’ one defense against the end of the world.
Below are how modern works borrow or reinterpret this name or story — not the original material. The two differ, so keep them apart.