Jormungandr

This is of one of the oldest surviving names for the Midgard Serpent in Norse and Teutonic mythology. The word Jormungandr is linked linguistically with ‘immense’ and ‘the earth’ and was sometimes used in early poetry.

John and Caitlin Matthews, The Element Encyclopaedia of Magical Creatures, 2013, Jormungandr, p 261