Question: Who was a jazz singer,  Leon Redbone or Howard Kazanjian?
Context: Leon Redbone (True name and date of birth are unsubstantiated) is a singer-songwriter and guitarist specializing in jazz, blues, and Tin Pan Alley classics.  Recognized by his Panama hat, dark sunglasses, and black tie, Redbone first appeared on stage in Toronto, Canada in the mid-1970s. Double Time is the second studio album by singer/guitarist Leon Redbone, released in 1977.  It peaked at #38 on the "Billboard" pop album charts. From Branch to Branch is the fourth studio album by Leon Redbone, released in 1981.  It was his first on Atlantic Records and peaked at No. 152 on the "Billboard" Pop Albums charts. "Big Bad Bill (Is Sweet William Now)" is a song with music by Milton Ager and lyrics by Jack Yellen, written in 1924.  The song became a vocal hit for Margaret Young accompanied by Rube Bloom, and an instrumental hit for the Don Clark Orchestra.  The song has also been recorded by Ernest Hare (1924), Billy Murray (1924), Clementine Smith (1924), Emmett Miller (1929), Glen Gray & the Casa Loma Orchestra (1940), Peggy Lee (1962), Merle Haggard (1973), Ry Cooder (1978), Leon Redbone (1978), Van Halen (1982) and others and has been a popular song in barbershop quartet and chorus competitions. Chris Enss (born 1961) is an American author and screenwriter.  Enss has written more than 20 books on the subject of women in the Old West, and has collaborated with producer Howard Kazanjian on four books, including two about Roy Rogers and Dale Evans. Howard G. Kazanjian (born July 26, 1942) is an American film producer known for "Raiders of the Lost Ark" and "Return of the Jedi".  Kazanjian is also a former 8-year Vice President of Lucasfilm, Ltd., and a published non-fiction author. Raiders of the Lost Ark (also known as Indiana Jones and the Raiders of the Lost Ark) is a 1981 American action adventure film directed by Steven Spielberg, with a screenplay written by Lawrence Kasdan, from a story by George Lucas and Philip Kaufman.  It was produced by Frank Marshall for Lucasfilm Ltd., with Lucas and Howard Kazanjian as executive producers.  Starring Harrison Ford, it was the first installment in the "Indiana Jones" film franchise to be released, though it is the second in internal chronological order.  It pits Indiana Jones (Ford) against a group of Nazis who are searching for the Ark of the Covenant, which Adolf Hitler believes will make his army invincible.  The film co-stars Karen Allen as Indiana's former lover, Marion Ravenwood; Paul Freeman as Indiana's rival, French archaeologist René Belloq; John Rhys-Davies as Indiana's sidekick, Sallah; Ronald Lacey as Gestapo agent Arnold Toht; and Denholm Elliott as Indiana's colleague, Marcus Brody. Champagne Charlie is the third studio album Leon Redbone, released in 1978.  It peaked at No. 163 on the "Billboard" Pop Albums charts. Return of the Jedi (also known as Star Wars: Episode VI – Return of the Jedi) is a 1983 American epic space opera film directed by Richard Marquand.  The screenplay by Lawrence Kasdan and George Lucas was from a story by Lucas, who was also the executive producer.  It was the third installment in the original "Star Wars" trilogy and the first film to use THX technology.  The film is set one year after "The Empire Strikes Back" and was produced by Howard Kazanjian for Lucasfilm Ltd.  The film stars Mark Hamill, Harrison Ford, Carrie Fisher, Billy Dee Williams, Anthony Daniels, David Prowse, Kenny Baker, Peter Mayhew and Frank Oz. Lyle Moraine (February 7, 1914 – February 13, 1988) is best known for writing "Christmas Island" (1946), a song recorded by The Andrews Sisters, Leon Redbone, Jimmy Buffett, Bob Atcher, Bob Dylan, and Petty Booka among others.  He was born in Council Bluffs, Iowa, and died in Glendale, California.
Answer: Leon Redbone