Dumballah is the great sky-serpent and father of all the Iwa. Dumballah created all the waters of the Earth. The movement of his 7,000 coils formed hills and valleys on Earth and brought forth stars and planets in cosmos. He formed the sacred rocks and stones of the world. The reflections in the water Dumballah had created had created a rainbow. Dumballah fell in love with the rainbow, who later became his wife, Aida-Wedo.
More information about the creation story can be found here.
More information about the creation story can be found here.