The name of the hero who fought the Minotaur in the labyrinth is Theseus. In Greek mythology, Theseus is celebrated for his bravery and intelligence. Upon entering the labyrinth, designed by Daedalus, Theseus used a ball of thread provided by Ariadne to navigate back after slaying the Minotaur, a half-man, half-bull creature. This act not only showcased his courage but also symbolized the triumph of reason and cleverness over brute strength. Theseus later becomes a legendary king of Athens and a figure of heroism in Greek lore.