Question: How much older was Clyde Barrow's brother than his wife?

Context paragraphs:
The Doberman Gang: The Doberman Gang is a 1972 film about a talented animal trainer who uses a pack of Dobermans to commit a bank robbery.  The six dogs were all named after famous bank robbers.  Their names were Dillinger (John Dillinger), Bonnie (Bonnie Parker), Clyde (Clyde Barrow), Pretty Boy Floyd, Baby Face Nelson, and Ma Barker.

Bonnie &amp; Clyde (2013 miniseries): 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.

Jeremy Jordan (actor): Jeremy Michael Jordan (born November 20, 1984) is an American actor and singer.  He has performed on Broadway and in television and film, as well as in other theatrical productions.  He is best known for the roles of Jack Kelly in the 2012 musical "Newsies" and Clyde Barrow in the 2011 musical "Bonnie & Clyde".  He currently plays Winslow "Winn" Schott, Jr., the son of DC Comics villain character Toyman, on the CBS /CW DC Comics based superhero drama series "Supergirl".

Buck Barrow: Marvin Ivan "Buck" Barrow (March 14, 1903 – July 29, 1933) was a member of the Barrow Gang.  He was the older brother of the gang's leader, Clyde Barrow.  He and his wife Blanche were wounded in a gun battle with police four months after they joined up with Bonnie and Clyde.  Marvin died of his wounds.

Ralph Fults: Ralph Fults (January 23, 1911 – March 16, 1993) was a Depression-era outlaw and escape artist associated with Raymond Hamilton, Bonnie Parker and Clyde Barrow of the Barrow Gang.

W. D. Jones: 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."

Blanche Barrow: Blanche Barrow (born Bennie Iva Caldwell; January 1, 1911 – December 24, 1988) was a fringe member of Bonnie and Clyde's gang and the wife of Clyde Barrow's brother Buck.  Brought up by her father, she had a poor relationship with her mother, who arranged for Blanche to be married to an older man.  Blanche ran away and met Buck Barrow.  He was 8 years older, and a fugitive.

Bonnie and Clyde (film): Bonnie and Clyde is a 1967 American biographical crime film directed by Arthur Penn and starring Warren Beatty and Faye Dunaway as the title characters Clyde Barrow and Bonnie Parker.  The film features Michael J. Pollard, Gene Hackman, and Estelle Parsons, with Denver Pyle, Dub Taylor, Gene Wilder, Evans Evans, and Mabel Cavitt in supporting roles.  The screenplay was written by David Newman and Robert Benton.  Robert Towne and Beatty provided uncredited contributions to the script; Beatty also produced the film.  The soundtrack was composed by Charles Strouse.

Bonnie and Clyde (disambiguation): Bonnie and Clyde refers to the American outlaw couple Bonnie Parker and Clyde Barrow.

Bonnie &amp; Clyde (musical): 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.

Supporting paragraphs: Buck Barrow Blanche Barrow
Answer: 8 years older