Tiw. ... The god Tiw was a deity of chief importance to the Anglo-Saxons as he was the god of war, swordplay, and the sky. Even though the Anglo-Saxons appealed to both Thunor and Woden in matters of warfare, Tiw was the official god of war. Tiw could also have been the original Allfather.
He is the Germanic version of Tyr the God of War. Tiw is shrouded in a great deal of mystery, speculation, and rumor. The Germans or Teutons called him Tiw or Ziu, but rumors persist that he was also known as Things. Which things? We have no idea. But that, so we are told, is where the German word for Tuesday (Dienstag) is derived.