Tycho Celchu is a character in the Star Wars universe. He was a native of Alderaan, and he lost his entire family when the planet was destroyed by the Death Star. He was a member of the Imperial Navy at the time, but the destruction of his world spurred him to join the Rebel Alliance as a starfighter pilot. He later continued to serve as a pilot for the New Republic. He eventually became a General in the Galactic Alliance Defense Force.
There are characters named Tycho in the computer games Fallout and Marathon, and in the Warhammer 40,000 game.
Tycho is a Greek name that means "hitting the mark". I think the fact that it can be shortened to the modern nickname 'Ty', makes this name a little less archaic. In 2011, 13 boys in the United States were named Tycho.