Tyr was a god of war and justice worshipped across the Germanic regions of Europe, and became later known as one of the Æsir-gods of Asgard and sons of Odin. He was considered as one of the most brave gods within the pantheon.
He played an important role during the binding of the wolf Fenrir, one of the children of Loki and Angrboða. The gods feared that the wolf would become too big and become a thread to the world, so they decided to bind the beast. They asked the dwarves to make Gleipnir, a thin binding that is stronger than any chain. The gods told Fenrir that they would only test the binding on him, but the wolf was suspicious and asked for one of the gods to put one their hands in his mouth as collateral. Týr was the only one brave enough to agree to this. The gods ensnared the wolf, and Fenrir bit Tyr's hand off.
During Ragnaök, the Norse version of the end times, he would battle the monstrous hound Garmr.
The Roman historian and politician Tacitus compared Trr to their god Mars: Among the gods Mercury is the one they principally worship. They regard it as a religious duty to sacrifice to him, on fixed days, human as well as other sacrificial victims. Hercules and Mars they appease by animal offerings of the permitted kind. Part of the Suebi sacrifice to Isis as well.
Jordanes, a 6th-century Byzantine bureaucrat, was notably appalled in his writings on how the god was honoured with the sacrifice of humans.