Hrapp is an old Icelandic ghost from the days of the early viking settlers on the island. I read about him in a book that contains translated stories from many sagas of the prose edda. It's called "The Sagas of Icelanders" and it's published by Penguin Classics if anyone is interested in vikings, though most of the stories aren't so supernatural.

Hrapp was a nasty piece of work in life; he found excuses to attack his neighbors and generally make life miserable for his own household. When he lay dying of an illness in his old age he asked his wife to bury him head-up as if he were standing under the doorway of his house so that he could "watch over the household." His ghost then proceeded to kill the servants and livestock and generally cause chaos.

Hrapp's corpse was dug up and moved to the outer edges of his land, but he still managed to kill people or drive them crazy. The farm lay uninhabited for over a decade until it was given to another man as a reward for heroism. One night, Hrapp was keeping the farm hands from leading the cattle into the stable and the new owner came out to challenge him with a spear he'd been given by the king of Norway. Hrapp grasped the spearhead and broke it off, then sank into the ground and dissapeared.

The next morning they dug up Hrapp's corpse for the second time, and though he'd been dead for years his body showed no sign of decay. They burnt his body and scattered his ashes, and that was the end of the haunting.