Tyr-Tiw the rune of 'Higher knowledge and militant bearing'.
Karl Theodor Weigel - National Socialist runologist
The Tyr rune is named after the god Tyr, whom we Saxons call Tiw. As the National Socialist runologist K.T.Weigel (1892-1953) states in his book 'Runes and Symbols' - this is the rune of Higher knowledge and militant bearing. These are attributes given to Tiw as the god of war and justice. The rune itself is connected to the symbol for 'male' which derives from the astrological sign for Mars, the Roman name for Tiw.
On an esoteric level the rune can be seen as a upwards path (the central stave) leading up the sacred mountain - symbolism I've seen in dreams before. Thus it is a rune of sacrifice and struggle, again symbolised in the saga of Tyr who sacrifices one hand to the Fenris wolf. If you look at the rune it is itself a symbol of a man upright with his two arms either side. The name Tiw etymologically means Two, however after his sacrifice we can see by removing one arm that it becomes the Lagu rune - itself symbolising the Warrior.
Tiw gives his name to Tuesday - and is himself the ancestral god of the Teutonic tribes. His name connects to the Proto-Germanic theudanoz, from PIE teuta-, the common word for "people, tribe" which cognates with the Lithuanian tauto, Old Irish tuath, Gothic þiuda, and Old English þeod * meaning race or nation.
* this is the root of the name Theoden from Tolkien's Lord of the Rings - and Theodor, Karl Weigel's middle name.