So when I found out that house elves in Harry Potter stories are Brownies in English stories, I also discovered that Brownies and Boggarts are related. I wouldn't have guessed that when boggarts jumped out of closets and turned into dementors, Snape, spiders, and other things. Did you?

Here is a description of Boggarts from Creatures of English Folklore:

Brownie
A generic term for fairies in England and Scotland, they were generally benevolent but could turn bad if they were neglected. They were small in appearance and wore brown clothing.

Boggart
A type of brownie, who caused poltergeist activity, they were common in Lancashire, and many places are named after them. Boggart Clough, near Manchester, The Boggart Stones, Boggart Lane etc.

Dobby
A hobgoblin belonging to Yorkshire and Lancashire. Dobby stones were stones onto which fairy offerings were placed.

Dobie
A type of Brownie.


Now, let's see what else I can find out about Boggarts!