Monkey hatches from a stone egg and makes his home in the forest. Over time, he becomes obsessed with seeking immortality, and travels the world to find a teacher. He finds Subodhi in the Mountain of Heart and Mind, who gives him the name Sun Wu Kong - the Monkey with the Realisation of Emptiness.
According to Wikipedia:
Monkey hatches from a stone egg and makes his home in the forest. Over time, he becomes obsessed with seeking immortality, and travels the world to find a teacher. He finds Subodhi in the Mountain of Heart and Mind, who gives him the name Sun Wu Kong - the Monkey with the Realisation of Emptiness.