15th century Scotland was home to an inbred, thieving, cannibalistic family that gave way to inspire such horror films like, "The Hills Have Eyes." It's a legendary and disturbing story that is mixed with probably fact and legend. Anyway, from what I've researched this is their story.
Their story starts out, a man named, Sawney Beane was the son of a peasant, he didn't like the labor his family had to do so he ran away with a woman who was just as crazy. They decided to live in a cave on the coast of Gallowy. The two wayward lovers would rob people then take them back to their cave and eat them.
The murderous pair had eight sons and six daughters, the family was inbred so they also had plenty of grandchildren. The whole family for many years lived in hiding while doing their hideous acts. When finally the family was found, according to the book, 'The Natural History of the Vampire,' in 1435, the family was executed. This tale is steeped in legend and some historians even believe that this family didn't actually exist. Either way, it's a brutal tale that has inspired much horror pop culture from books to cinema.
The Natural History of the Vampire by Anthony Masters