According to Norse mythology, they are called Jötunn and precede humanity and are as old as gods and share more or less common ancestors and are often very talented mages and witches, some of them even rival the gods. Some of Odin's sons are known to be half-Giant including but not limited to: Thor and Vidar. The norse also said that Midgard, or Earth, was built from Ymir's remains. No Giants are known to live outside ofJötunheimr. In Norse myth some giants are as wise as gods, excluding Odin. The name for these beings outside of Norse mythology is Giant.