Question: Were George Tzavellas and Max Linder both directors and screenwriters?

Context articles: The Man in the Silk Hat
George Tzavellas
Max Linder
Une nuit agitée
Max Takes Tonics
Max Wants a Divorce
Une idylle à la ferme
Max and His Mother-in-Law
Charles Prince (actor)
The Romance of Max

The Man in the Silk Hat (French: "L'homme au chapeau de soie" ) is a 1983 French documentary film about the films of the French silent film star Max Linder, directed by his daughter, Maud Linder.
George Tzavellas, also rendered Giorgos Tzavellas, Yiorgos Tzavellas, or Yorgos Javellas (Greek: Γιώργος Τζαβέλλας , 1916, Athens – October 18, 1976), was a Greek film director, screenwriter, and playwright.
 His filmmaking was particularly influential, with critic Georges Sadoul considering him "one of the three major postwar Greek directors" (along with Michael Cacoyannis and Nikos Koundouros).
Gabriel-Maximilien Leuvielle (16 December 188331 October 1925), better known by the stage name Max Linder (] ), was a French actor, director, screenwriter, producer and comedian of the silent film era.
 His onscreen persona "Max" was one of the first recognizable recurring characters in film.
 He has also been cited as the "first international movie star."
Une nuit agitée (aka: An Agitated Night)is a 1912 short film directed by and starring Max Linder.
 The story was by Linder and fellow film colleague Louis Feuillade.
 The film was produced and distributed by the Pathe Freres company.
Max Takes Tonics (French: Max victime du quinquina) is a 1911 French film directed by Max Linder.
Max Wants a Divorce is a 1917 American short film directed by Max Linder.
Une idylle à la ferme is a 1912 French short film written and directed by and starring Max Linder.
 It is known as A Farm-house Romance in the United Kingdom.
 In this Pathé comedy, Max, an "elegant but disaster-prone man-about-town," visits a farm to meet a prospective wife at the behest of his wealthy uncle.
Max and His Mother-in-Law (French: Max et sa belle-mère) is the title of both a 1911 and 1914 French film directed by Max Linder, Lucien Nonguet.
Charles Prince Seigneur (27 April 187218 July 1933) was a French-born film actor and comedian, best known for his screen persona ""Rigadin"" in numerous short slapstick comedies.
 He was also known as "Moritz" in Germany, "Whiffles" in England and the US, and "Tartufini" in Italy.
 He was the second biggest film star in the world in the years leading up to World War I, just behind his rival Max Linder.
 Prince's "Rigadin" character was similar to Linder's "Max" in that they were both upper-class dandys that were constantly getting into trouble with authority figures and love interests.
 Prince began his acting career on the stage and was hired by Pathé Frères in 1908.
 He made over 200 films as "Rigadin" from 1909 until 1920.
 By 1920 his popularity had faded and he played supporting roles in a handful of films in the 1920s and 1930s.
The Romance of Max (French: "Le Roman de Max" ) is a 1912 French short silent romantic comedy fantasy film directed by and starring Max Linder for Pathé Frères.
 The 6 minute, 8 second film was released on December 20, 1912.
 The plot may have been inspired by Emile Cohl's "Matrimonial Shoes", (French: "Les chaussures matrimoniales" ) from 1909, a shorter film with a similar storyline and animation.