Titan is the largest moon of Saturn. (Trivia note: one Uranus's moons is named Titania.)
In Greek Mythology, a Giant, and one of two generations of immortal giants (Titans) of incredible strength and stamina who were overthrown by a race of younger gods, the Olympians.
Titan, name of one of the dragon elders in game "Spyro the Dragon"
The Titans, from Attack on Titan