In Miss Peregrine's Home for Peculiar Children, the secondary villains are Hollowgasts, large, monstrous, faceless creatures. Their design is exactly like the creepy pasta urban legend of Slenderman. Long limbs, no facial features, hides in the shadows, hunts children, very sharp suit. Even the tentacles are similar, though the book used tentacles from their mouths, and Slenderman has tentacles from his limbs/back.
Was this intentionally done? Is there any production or word of God explication for the similarity? The book examples of Hollowgasts have facial features, and are somewhat different.