Английский Этимологический словарь - troll (n.)

- "ugly dwarf or giant," from O.N. troll "giant, fiend, demon." Some speculate that it originally meant "creature that walks clumsily," and derives from P.Gmc. *truzlan, from *truzlanan (see troll (v.)). But it seems to have been a general supernatural word, cf. Swed. trolla "to charm, bewitch;" O.N. trolldomr "witchcraft." The old sagas tell of the troll-bull, a supernatural being in the form of a bull, as well as boar-trolls. There were troll-maidens, troll-wives, and troll-women; the trollman, a magician or wizard, and the troll-drum, used in Lappish magic rites. The word was popularized in Eng. by 19c. antiquarians, but it has been current in the Shetlands and Orkneys since Viking times. The first record of it is from a court document from the Shetlands in 1616, regarding a certain Catherine, who, among other things, was accused of "witchcraft and sorcerie, in hanting and seeing the Trollis ryse out of the kyrk yeard of Hildiswick." Originally conceived as a race of giants, they have suffered the same fate as the Celtic Danann and are now regarded in Denmark and Sweden as dwarfs and imps supposed to live in caves or under the ground.