Question: What artist created a traditional folk song among prisoners in the American South as well as Maybellene?

Context paragraphs:
Sarie Marais: "Sarie Marais" (also known as "My Sarie Marais" and pronounced "May SAH-ree mah-REH") is a traditional South African folk song, created during either the First Anglo-Boer War (c. 1880) (less likely) or the Second Anglo-Boer War (ca. 1900).  The tune was possibly taken from a song dating from the American Civil War called "Ellie Rhee" (itself perhaps a version of the traditional folk song "Foggy Dew"), with the words translated into Afrikaans.

Here We à Go Go Again!: Here We à Go Go Again!  is Johnny Rivers's second official album, and like his first album, "At the Whisky à Go Go", it was recorded live at the Whisky a Go Go in Los Angeles, California.  The album reached #38 on the Billboard Charts and spawned two hit singles: "Maybellene" and "Midnight Special".

Contemporary folk music: Contemporary folk music refers to a wide variety of genres that emerged in the mid 20th century and afterwards which were associated with traditional folk music.  Starting in the mid-20th century a new form of popular folk music evolved from traditional folk music.  This process and period is called the (second) folk revival and reached a zenith in the 1960s.  The most common name for this new form of music is also "folk music", but is often called "contemporary folk music" or "folk revival music" to make the distinction.  The transition was somewhat centered in the US and is also called the American folk music revival.  Fusion genres such as folk rock, folktronica, and others also evolved within this phenomenon.  While contemporary folk music is a genre generally distinct from traditional folk music, it often shares the same English name, performers and venues as traditional folk music; even individual songs may be a blend of the two.

On Top of Old Smoky: "On Top of Old Smokey" is a traditional folk song of the United States.  As recorded by The Weavers, the song reached the pop music charts in 1951.  It is catalogued as Roud Folk Song Index No. 414.  In one version the first verse is the following; for more on the words see below.

The House of the Rising Sun: "The House of the Rising Sun" is a traditional folk song, sometimes called "Rising Sun Blues".  It tells of a life gone wrong in New Orleans; many versions also urge a sibling to avoid the same fate.  The most successful commercial version, recorded in 1964 by British rock group the Animals, was a number one hit on the UK Singles Chart and also in the United States and France.  As a traditional folk song recorded by an electric rock band, it has been described as the "first folk-rock hit".

Song So-hee: Song So-hee (born October 20, 1997), is a South Korean singer who specializes in minyo, traditional Korean folk songs.  She has been active since childhood and has often been called a "young female master singer".  She became famous nationwide after she performed "Changbu Taryeong", a well-known Korean traditional folk song, at the KBS National Singing Contest.  She left a deep impression upon the viewers with her performance.  Since then she has been invited to perform at various events, both at home and abroad.  Currently she is a first-year college student at Dankook University (as a traditional music major) and successfully manages her life as a student and a performer.

Folk Den: Folk Den is a folk music website founded in 1995 by Roger McGuinn, former front man of The Byrds.  Hosted at the University of North Carolina at Chapel Hill's ibiblio, the site is intended to preserve and promote folk music and offers a new folk song on a monthly basis.  Each posting provides an MP3 of a traditional folk song along with a descriptive paragraph, lyrics, guitar chords and related images.  The site has received positive reviews from "The New York Times", the Discovery Channel, and CNET.

Billy Boy: "Billy Boy" is a traditional folk song and nursery rhyme found in the United States.  It has a Roud Folk Song Index number of 326.  It is a variant of the traditional English folk song "My Boy Billy", collected by Ralph Vaughan Williams and published by him in 1912 as number 232 in "Novello's School Songs".  The song is very popular with the Orange Order.

Midnight Special (song): "Midnight Special" is a traditional folk song thought to have originated among prisoners in the American South.  The title comes from the refrain, which refers to the passenger train "Midnight Special" and its "ever-loving light" (sometimes "ever-living light"):

Min'yō: Min'yō (民謡 ) is a genre of traditional Japanese music.  The term is a translation of the German word "Volkslied" (folk song) and has only been in use since the twentieth century.  Japanese traditional designations referring to more or less the same genre include "inaka bushi" ("country song") "inaka buri" ("country tune"), "hina uta" ("rural song") and the like, but for most of the people who sang such songs they were simply "uta" (song).  The term min'yō is now sometimes also used to refer to traditional songs of other countries, though a preceding adjective is needed: Furansu min'yō = French folk song; for this reason, many sources in Japanese also feel the need to preface the term with "Nihon": Nihon min'yō = Japanese [traditional] folk song.

Supporting paragraphs: Here We à Go Go Again! Midnight Special (song)
Answer: Johnny Rivers