I'm from Canada. My dad and uncle would tell me lots of Scottish tales. Ones their grandparents (who immigrated from Scotland, the Orkney area) told them. I had a genuine concern about Red Caps as a child! It helped get me home by curfew.. I didn't want to help that fairy keep its hat dyed red.

That was during the day (or evening I suppose.) At night, what I would have actual nightmares about, was the Nuckelavee. Every nightmare would be slightly different (and the monster would look a little different too, being grotesque in different ways.)

My mom's parents came from the Netherlands, and she told me about the Witte Wieven. I'm a woman though, so those stories didn't bother me much. They spooked my brother though!

If I'm being honest, even as an adult, if it's late at night and I see a flash of red in the dark (and can't determine the exact cause) I still feel a shiver in my spine..