On another note, there is also a song about a Troll that runs rather well to the tune of a song called "The Fox". (Fox went out one chilly night. He prayed for the moon to give him light. For he'd many a mile to go that night. Before he'd reach the town-oh, town-oh, town-oh, many a mile to go that nightbefore he'd reach the town-oh).
The only problem I have with the Troll song is that it doesn't actually rhyme everywhere even though it looks that way.