Elleman
The Ellefolk are a form of Fae from Denmark, and the males are called Elleman. They resemble wrinkled old men with flat hats pulled over their brows. They lay down pretending to be in distress or lie in wait for people. When someone approaches the Elleman will curse that person and possibly their entire village, causing illness. If an animal grazes in a field where one of the Elleman has peed or spit, the animal will quickly waste and die, and if it is a cow then this sickness can be passed through the milk. This can be avoided if the farmers ask permission from the Elleman for their animals to graze.
Citations:
Maberry, Jonathan. Vampire Universe: The Dark World of Supernatural Beings That Haunt Us, Hunt Us, and Hunger for Us. United States, Kensington Publishing Corporation, 2006.