https://en.wikipedia.org/wiki/Old_Norse
Old Icelandic was very close to Old Norwegian, and together they formed Old West Norse, which was also spoken in Norse settlements in Greenland, the Faroes, Ireland, Scotland, the Isle of Man, northwest England, and in Normandy. Old East Norse was spoken in Denmark, Sweden, Kievan Rus', eastern England, and Danish settlements in Normandy. The Old Gutnish dialect …