Where did werewolves originally came from?

There are many different origins to where werewolves come from. Some say they originated from the medieval times in Europe. One story told there was one about the "Wolf-Man". It is said that he had killed over 100 people in a small village, mostly women. Books told of wolf-like bite marks in the victims. Another story is that they originated from a Native American tribe. This tribe sometimes did special rituals, making themselves into "skinwalkers". Skinwalkers are said to be cursed, although they have the power to change into any animal form, especially wolves. They can also imitate the exact voice of anyone they hear. That is all I know of, but there are probably other stories too. Hope this Helps. :)