Question: Were Henry Winkler and Arthur Rosson both directors?

Context articles: The Last Outlaw (1927 film)
Sahara (1919 film)
Fine Manners
Wet Paint (film)
Arthur Rosson
King of the Sierras
Henry Winkler
Discord and Harmony
For Those We Love
Women Who Play

The Last Outlaw is a 1927 American silent Western film directed by Arthur Rosson and starring Gary Cooper, Jack Luden, and Betty Jewel.
 Written by John Stone and J. Walter Rubin, based on a story by Richard Allen Gates, the film is about a frontiersman who falls in love with a pretty woman whose brother is accused of murder.
 He tries to prove the young man innocent of the charges, but when he is appointed sheriff, he is obliged to track down and arrest the boy.
 A 16mm reduction positive print exists of this film.
Sahara is a 1919 American dramatic film written by C. Gardner Sullivan and directed by Arthur Rosson.
 The film starred Louise Glaum and told a story of love and betrayal in the Egyptian desert.
Fine Manners is a 1926 American black-and-white silent comedy film directed initially by Lewis Milestone and completed by Richard Rosson for Famous Players-Lasky/Paramount Pictures.
 After an argument with actress Gloria Swanson, director Milestone walked off the project, causing the film to be completed by Rosson, who had picked up directorial tricks while working as an assistant director to Allan Dwan.
 The success of the film, being Rosson's first directorial effort since he co-directed "Her Father's Keeper" in 1917 with his brother Arthur Rosson, won him a long-term contract with Famous Players-Lasky.
Wet Paint is a 1926 American comedy silent film directed by Arthur Rosson and written by Lloyd Corrigan and Reggie Morris.
 The film stars Raymond Griffith, Helene Costello, Bryant Washburn, Natalie Kingston and Henry Kolker.
 The film was released on May 3, 1926, by Paramount Pictures.
Arthur Rosson (24 August 1886 – 17 June 1960) was an English film director.
 From 1917 to 1948, Rosson directed 61.
 He also worked on many major films as a second unit director until 1960, particularly for Cecil B. DeMille.
King of the Sierras is a 1938 American western directed by Samuel Diege and Arthur Rosson and distributed by Grand National Pictures.
Henry Franklin Winkler (born October 30, 1945) is an American actor, director, comedian, producer, and author.
Discord and Harmony is a 1914 American silent short romantic drama film directed by Allan Dwan and featuring Murdock MacQuarrie, Pauline Bush, and Lon Chaney.
 The film's scenario, written by Arthur Rosson, was based on an event experienced by composer Ludwig van Beethoven.
 The film is now considered lost.
For Those We Love is a 1921 American silent romantic drama film drama produced by and starring Betty Compson and Lon Chaney.
 Directed by Arthur Rosson, the film was distributed by Goldwyn Pictures.
 It is now considered to be a lost film.
Women Who Play is a 1932 British comedy film directed by Arthur Rosson and produced by Walter Morosco and Alexander Korda with a screenplay by Basil Mason and Gilbert Wakefield.
 It stars Mary Newcomb, Benita Hume and George Barraud.
 In order to deter his wife from having an affair a man hires an actress as part of an elaborate scheme.
 It is based on the play "Spring Cleaning" by Frederick Lonsdale.