The name comes from the old German words lureln, Rhine dialect for "murmuring", and the Celtic termley "rock". The translation of the name would therefore be: "murmur rock" or "murmuring rock". The heavy currents, and a small waterfall in the area (still visible in the early 19th century) created a murmuring sound, and this combined with the special echo the rock produces to act as a sort of amplifier, giving the rock its name. The murmuring is hard to hear today owing to the urbanization of the area. Other theories attribute the name to the many accidents, by combining the German verb "lauern" (to lurk, lie in wait) with the same "ley" ending, with the translation "lurking rock".
By the German language orthographic reform of 1903, in almost all German terms letter "y" was changed for letter "i", but in some German names the letter "y" was kept, such as Speyer, Spay, (Rheinberg-)Orsoy, and including Loreley, which is thus the correct spelling in German.
Original folklore and the creation of the modern myth
The rock and the murmur it creates have inspired various tales. An old legend envisioned dwarves living in caves in the rock.
In 1801, German author Clemens Brentano composed his ballad Zu Bacharach am Rheine as part of a fragmentary continuation of his novel Godwi oder Das steinerne Bild der Mutter. It first told the story of an enchanting female associated with the rock. In the poem, the beautiful Lore Lay, betrayed by her sweetheart, is accused of bewitching men and causing their death. Rather than sentence her to death, the bishop consigns her to a nunnery. On the way thereto, accompanied by three knights, she comes to the Lorelei rock. She asks permission to climb it and view the Rhine once again. She does so and falls to her death; the rock still retained an echo of her name afterwards. Brentano had taken inspiration from Ovid and the Echo myth.
In 1824, Heinrich Heine seized on and adapted Brentano's theme in one of his most famous poems, Die Lorelei. It describes the eponymous female as a sort of siren who, sitting on the cliff above the Rhine and combing her golden hair, unwittingly distracted shipmen with her beauty and song, causing them to crash on the rocks. In 1837 Heine's lyrics were set to music by Friedrich Silcher in the art songLorelei that became well known in German-speaking lands. A setting by Franz Liszt was also favored and over a score of other musicians have set the poem to music.
The Lorelei character, although originally imagined by Brentano, passed into German popular culture in the form described in the Heine-Silcher song and is commonly but mistakenly believed to have originated in an old folk tale. The French writer Guillaume Apollinaire took up the theme again in his poem "La Loreley", from the collection Alcools which is later cited in Symphony No. 14 (3rd movement) of Dmitri Shostakovich.
References in other works of art
Works about, or referencing, the Lorelei:
German composer Felix Mendelssohn began an opera in 1846 based on the legend of the Lorelei Rhine maidens for Swedish soprano Jenny Lind; however, he died before he had the chance to finish it
German composer Clara Schumann composed another version of Heine's poem in 1843.
Norwegian goth-metal band Theatre of Tragedy released a song entitled "Lorelei", with lyrics by band member Raymond Rohonyi, on their 1998 album Aégis. 
The Pogues recorded "Lorelei" in 1989 on their album Peace and Love. "But if my ship, which sails tomorrow // Should crash against these rocks, // My sorrows I will drown before I die // It's you I'll see, not Lorelei" 
A number of other musical works related to the subject of this article, along with others simply named "Loreley" or "Lorelei", may be found on the disambiguation page.
A barge carrying 2,400 tons of sulphuric acid capsized on January 13, 2011, near the Lorelei rock, blocking traffic on one of Europe's busiest waterways.