Norsemen are the group of people who spoke what is now called the Old Norse language or Icelandic between the 8th and 11th centuries. The language belongs to the North Germanic branch of the Indo-European languages, and is the earlier form of modern Scandinavian languages.
Norseman means "man from the North" and applied primarily to Old Norse-speaking tribes living in southern and central Scandinavia. In history, "Norse" or "Norseman" could be any person from Scandinavia, even though Iceland, Norway, Denmark and Sweden were different sets of people by the Middle Ages.
Typically the term Norse refers to the West Norse, meaning mainly Icelanders when reading about settlements in and colonization of America, Normandy, Iceland, Greenland, Ireland, Scotland, Wales, Shetland, Orkney, the Hebrides, the Faroe Islands and Mann. In some other historical references, the term may also refer to the East Norse, meaning mainly Danes and Swedes, for instance, Cnut's Empire and Swedes adventures East.