Tyr is a god of war and justice in Norse mythology, belonging to the Aesir tribe. He is known as the bravest of the gods and is respected and revered by other gods, as well as loved by the Nordics. Tyr is also the god concerned with the formalities of war, especially treaties, and of justice. He is the one who makes the binding of Fenrir possible by sacrificing his right hand. Tyr is also known for his wisdom and power, which he used to stop wars instead of starting them. His name is derived from Tiw or Tiwaz, and he is equated with Mars, the receiver of human sacrifice. Tyr is the eponym of Tuesday, which means "Tyrs day".