Jörmungandr appears in Norse tradition.
Snorri’s Gylfaginning has the Midgard Serpent cast into the sea where it encircles the world and waits to rise. A named Norse world-serpent in that prose Edda, not serpent as a bare class and not dragon.
from Snorri Sturluson · Gylfaginning, c. 1220
appears in · sourced · documented