Adam Oehlenschläger,
The Gods of the North: an epic poem
“ JETTER, JOTUN. So were called the evil genii or giants of the Gothic mythology. Historically, they were probably the aboriginal inhabitants of Scandinavia, and were of Celtic race, with black hair. Being engaged in continual and deadly warfare with the Asar or Goths, from the time of Odin’s invasion, these last may have, from a spirit of national hatred, transferred the appellation Jotun to the evil genii of their own mythology, before that epoch termed Hrimthusser. ”
