|Combat with troll|
The word may originally been connected with magic, as you have such words as Old Norse trollmann, 'wizard', and trolldomr, 'witchcraft'. Some traditions say they cannot stand sunlight, if caught out at daybreak they will transform into inanimate matter. An ultimate root of the word has been suggested meaning 'trundler', giving the impression of an uncouth creature. Trolls have also been referred to in the form of bulls, boars and even ordinary humans.
Trolls were supposed to live in groups rather than singly. In fact, one must bear in mind the belief in wildmen that is found in folklore all over Europe and even ask if trolls have any connection with bigfoot-type creatures. Did such creatures actually exist outside imagination?
In 1407 James Egelinus, a Scotsman, was shipwrecked on the Norwegian coast. There he saw wildmen and was told by the local humans that they would raid human houses and devour human captives, but could be driven off by dogs. Just what Egelinus encountered remains a mystery.
Trolls were reported in Iceland in the 18th Century.