Pontianak

According to Malay and Indonesian religious traditions a demon named pontianak usually did horrible things to men. It was believed that the spirits of women who died while pregnant transformed into this kind of ghost demon entity and then looked for vengeance from those who did them wrong (usually men). They are pretty similar to what we know in Western culture as vampires and there are stories about pontianaks removing bad mens genitalia with their bare hands. Lastly, a city in Indonesia is named after this demon, because people believed that a Pontianak haunted the first sultan who conquered the city and as you can imagine he didnt have such a happy ending.