The name of the serpent that appeared in various mythologies, often representing chaos, is Leviathan or Jörmungandr. In different cultures, these serpents symbolize primordial chaos and the uncontrollable forces of nature. Leviathan is known in Judeo-Christian traditions, while Jörmungandr is featured in Norse mythology and is fated to confront Thor during Ragnarök, embodying the struggle against chaos in cosmic battles.