To make sure your vessel is seaworthy.
Sailors in the 17th century would sometimes knock with their hands or tools on the wooden hull of their ship to listen for woodworm or rot, hearing a solid sound coming from wood in the hull would mean it was good to go (or ship shape). In fact this was a practice during the age of sail.
For continuing your good luck ...
Red hair was a sign of witchcraft in Christian Europe and it was said that it was often seen as a marker of guilt in the eyes of witch finders.
There are many examples of redheads being stereotyped as untrustworthy in medieval times. The "Proverbs of Alfred" warn not to choose a red-haired person as a friend and the "Secretum ...
In recent time the association seems to have been generally dismissed but not so long ago it was credible. Roland B. Dixon, The Color-Symbolism of the Cardinal Points, J. of American Folklore, V. 12, No. 44 (Jan. - Mar., 1899), pp. 10-16 is perhaps an outdated example.
The 7-regioned cosmos of the Pueblo peoples (yellow-corn of the North,
blue of the ...
Blake came before Tolkien, and Tolkien definitely knew the work of Blake.
In Blake's mythology, Orc is a fallen entity who embodies rebellion, and opposes the forces of order and tradition, represented by Urizen.
See: America, A Prophecy
I'm going to have to revisit Orcus from Roman Mythology, and will append this answer when I do, but I'd be ...
Sadly, I've never been able to find any direct references to Mathonwy anywhere.
Bromwich (pg. 439) mentions that the name Mathonwy itself could be a doublet for the name Math, like so many names in Culhwch ac Olwen are. If so, Mathonwy may never have represented a specific character.
One final thing worth mentioning is that it's unclear whether Mathonwy ...
Try "Goetia" instead of "Goethia". Roughly, it means the art of summoning angels, whether fallen or still elevated (though more commonly the former). The Ars Goetia is the first section of The Lesser Key of Solomon. Basically, it lists the demons (with various titles of nobility and royalty) supposedly captured and bound by Solomon. Crowley and another ...
Lechia is the mythological name for Poland, stemming from the word Lech (which is also a common first name).
According to legend, the name derives from the first ruler of Poland, Lech. It is also the derivation for the term Lechitic languages.
No one knows specifically when Valhalla became a part of Norse mythology, but it was -as far as we know- first recorded in the stanzas of a 10th century poem commemorating the Eric Bloodaxe known as Eiríksmál. This skaldic poem as compiled in Fagrskinna, a latter work written in 1220 that is know as one of the kings' sagas, a series of old Norse tales and ...
I found these definitions in the book  and in the paper :
Kratt: a demon who stole and brought food, money and other wordly goods to its maker and owner in the form of a whirlwind or meteor-like tail of fire
Pisuhänd: tail of fire, treasure-bringing goblin
Puuk: treasure-bringing goblin
Also, there's an additional passage:
Kratt, also called ...
This is not an account per se, but it is a source that proves such a belief existed in English folklore. Katharine Mary Briggs documents a Somerset rhyme that goes:
Ellum do grieve,
Oak he do hate,
Willow to walk,
If yew travels late
Dr. Briggs explains that the folksong embodies traditional beliefs that:
. . . if one elm tree is cut down, the one next ...
To expand slightly on the answer by @Semaphore.
In her An Encyclopedia of Fairies Hobgoblins, Brownies, Bogies, and Other Supernatural Creatures (page 159), after the Somerset rhyme, Katharine Mary Briggs adds:
Tolkien is faithful to folk
tradition in the ogre-ish behaviour of Old Man Willow.
Indeed, J.R.R. Tolkien would often draw from English folklore in ...
Romanian witchcraft is (not surprisingly given the religiosity of the country) rooted in Christianity, which in its turn copied the principles of a blood sacrifice and scapegoating from Judaism. Christianity and Judaism are strongly influenced by principles of blood magic.
Middle Eastern ancient religions quite often demanded bloodshed to mollify the gods. ...
This study should answer your question:
The wizards of the violet flame. A magical mystery tour of Romanian politics - Journal for the Study of Religions and Ideologies
It presents the manifestations of irrational practices in recent Romanian politics. Providing a short history of the mystical and the occult in Romanian politics, this research uses as a case ...
My anthropology professor linked it back to the belief that there were spirits, of whatever kind, living in trees and wood, and in order to keep them from hearing what you were saying and spoiling things when they were going well, you should knock on wood as you were speaking.
European folklore is replete with mentions of supernatural creatures being averse to iron, especially in the northwestern and northeastern regions. (Allow me also to highlight for passersby, as mentioned in the article you linked, that “cold iron” traditionally just signifies normal, plain-ol' iron, but nowadays the meaning is often extended to more ...