Question: How were the co-writers of The Legend of Bonnie and Clyde related?

Context articles: The Legend of Bonnie and Clyde (song)
Bonnie &amp; Clyde (2013 miniseries)
'03 Bonnie &amp; Clyde
Bonnie &amp; Clyde (musical)
W. D. Jones
Bonnie and Clyde
Today I Started Loving You Again
Teenage Bonnie and Klepto Clyde
Bonnie Owens
A Day in the Life of Bonnie and Clyde

"The Legend of Bonnie and Clyde'" is a song written by American country music artists Merle Haggard and Bonnie Owens and performed by Haggard.
 It was released in January 1968 as the first single and title track from the album "The Legend of Bonnie and Clyde".
 The song was Haggard's fourth number one on the U.S. country singles chart.
 The single spent two weeks at number one and a total of 14 weeks on the country chart.
Bonnie & Clyde is a revisionist 2013 miniseries about Great Depression-era outlaws Bonnie and Clyde starring Emile Hirsch as Clyde Barrow and Holliday Grainger as Bonnie Parker.
 The two-part film aired on consecutive nights, December 8 and 9, 2013, simultaneously on A&E, History, and Lifetime (all owned by A&E Networks).
 The first previews for the film were released on September 23, 2013.
 The series was widely criticized for its historical inaccuracies, particularly as it was aired on History.
"' 03 Bonnie & Clyde" is a song recorded by American rapper Jay-Z featuring his then-girlfriend, American singer Beyoncé.
 It was composed by Shawn Carter, Kanye West, Prince Nelson, Tupac Shakur, Darryl Harper, Ricky Rouse and Tyrone Wrice for Jay-Z's seventh studio album "" (2002).
 The song was released as the album's lead single on October 10, 2002.
 An East Coast hip hop and R&B song, "'03 Bonnie & Clyde" sampled its beat, lyrics, and theme from American rapper Tupac Shakur's 1996 song "Me and My Girlfriend", and was inspired by the crime film "Bonnie and Clyde".
 The instrumentation is based on programmed drums, bass instruments, and a flamenco guitar.
Bonnie & Clyde is a musical with music by Frank Wildhorn, lyrics by Don Black and a book by Ivan Menchell.
 The world premiere took place in La Jolla, California in November 2009.
 The musical centers on Bonnie Parker and Clyde Barrow, the ill-fated lovers and outlaws whose story has been infamous since they achieved folk hero status during the Great Depression.
 Wildhorn described the music as a "non-traditional score, combining rockabilly, blues and gospel music".
 The La Jolla run was followed by a Sarasota, Florida engagement in 2010.
William Daniel ("W.D.", "Dub", "Deacon") Jones (May 12, 1916 – August 20, 1974) was a member of the Barrow Gang, whose spree throughout the southern Midwest in the early years of the Great Depression became part of American criminal folklore.
 Jones ran with Clyde Barrow and Bonnie Parker for eight and a half months, from Christmas Eve 1932 to early September 1933.
 He was one of two gang members who were consolidated into the "C. W. Moss" character in the 1967 film "Bonnie and Clyde."
 "Moss was a dumb kid who run errands and done what Clyde told him," he later said.
 "That was me, all right."
Bonnie Elizabeth Parker (October 1, 1910 – May 23, 1934) and Clyde Chestnut Barrow also known as Clyde Champion Barrow (March 24, 1909 – May 23, 1934) were American criminals who traveled the central United States with their gang during the Great Depression, robbing people and killing when cornered or confronted.
 Their exploits captured the attention of the American public during the "Public Enemy Era," between 1931 and 1935.
 Though known today for their dozen-or-so bank robberies, the duo most often preferred to rob small stores or rural gas stations.
 The gang is believed to have killed at least nine police officers and several civilians.
 The couple was eventually ambushed and killed by law officers near Sailes, Bienville Parish, Louisiana.
 Their exploits were revived and cemented in American pop folklore by Arthur Penn's 1967 film "Bonnie and Clyde".
"Today I Started Loving You Again" is a song written by Merle Haggard and Bonnie Owens.
 Haggard first recorded it as a B-side to his number 1 hit "The Legend of Bonnie and Clyde", but it failed to chart.
 The song was later recorded by Al Martino, followed by many other artists, including Martina McBride, Charlie McCoy, David Peters, Kenny Rogers and the First Edition, Bettye Swann, Connie Smith, Sammi Smith, Bobby Bland, Emmylou Harris and Dolly Parton.
 More recently it was recorded by Jeff Carson and Merle Haggard for Carson's 1997 Album Butterfly Kisses.
Teenage Bonnie and Klepto Clyde is a 1993 American romantic crime film co-written and directed by John Shepphird and starring Maureen Flannigan as Bonnie and Scott Wolf as Clyde.
Bonnie Owens (October 1, 1929 – April 24, 2006), born Bonnie Campbell, was an American country music singer who was married to Buck Owens and later Merle Haggard.
A Day in the Life of Bonnie and Clyde is a 1968 studio album by Mel Tormé.
 It was released during a wave of renewed interest in the crime duo Bonnie and Clyde following the release of the 1967 film "Bonnie and Clyde".
 With the exception of the title track, an original song by Tormé, the album mostly consists of covers of popular songs from the late 1920s and early 1930s, around the period when the real-life Bonnie and Clyde were committing their bank robberies.
 (Another exception is "I Concentrate on You", a Cole Porter song from 1940.)