The Tunnel (French:Le tunnel) is a 1933 French-German science fiction film directed by Curtis Bernhardt and starring Jean Gabin, Madeleine Renaud and Robert Le Vigan.
 It was the French language version of the German film "The Tunnel", with a different cast and some changes to the plot.
 Both were followed in 1935 by an English version.
 Such Multiple-language versions were common in the years immediately following the introduction of sound, before the practice of dubbing had come to dominate international releases.
 Germany and France made a significant number of films together at this time.
The Lone Wolf is a 1917 American silent drama film based on the 1914 novel "The Lone Wolf" by Louis Joseph Vance.
 It was adapted for the screen by George Edwardes-Hall and was directed by Herbert Brenon.
 The film stars Bert Lytell and Hazel Dawn.
 The film was produced by Brenon and distributed by Lewis J. Selznick Enterprises.
 It is not known whether the film currently survives, and it may be a lost film.
Beatrice is a 1919 Italian silent historical film directed by Herbert Brenon and starring Francesca Bertini.
 It tells the story of Dante Alighieri's love to Beatrice Portinari, loosely based on Dante's poetry.
 It appears to be a separate film from Brenon's 1921 film "The Stronger Passion", which also had the original title of "Beatrice" although they may be alternative versions of the same production.
Herbert Brenon (13 January 1880 – 21 June 1958) born Alexander Herbert Reginald St. John Brenon was an Irish film director, actor and screenwriter during the era of silent movies through the 1930s.
A Daughter of the Gods was a 1916 American silent fantasy drama film written and directed by Herbert Brenon.
 The film was controversial because of the sequences of what was regarded as superfluous nudity by the character Anitia, played by Australian swimming star Annette Kellermann.
 The scene is regarded as the first complete nude scene by a major star, which occurred during a waterfall sequence, though most of Kellerman's body is covered by her long hair.
 It was filmed by Fox Film Corporation in Kingston, Jamaica where huge sets were constructed, and directed by Herbert Brenon.
Dr. Jekyll and Mr. Hyde is a 1913 horror film, directed by Herbert Brenon and Carl Laemmle, written by Brenon and produced by Laemmle.
 The picture is based on the Robert Louis Stevenson story "The Strange Case of Dr. Jekyll and Mr. Hyde" and stars King Baggot in the dual role of Jekyll and Hyde.
 The film was re-released in the US in August 1927.
The Eternal Sin is a lost 1917 silent film drama directed by Herbert Brenon and starring Florence Reed.
 Brenon produced and Lewis J. Selznick handled the distribution.
Curtis Bernhardt (15 April 1899 – 22 February 1981) was a German film director born in Worms, Germany, under the name Kurt Bernhardt.
 He trained as an actor in Germany, and performed on the stage, before starting as a film director in 1926.
 Other films include "A Stolen Life" (1946) and "Sirocco" (1951).
Beatrice is a 1921 Italian silent drama film directed by Herbert Brenon and starring Marie Doro and Sandro Salvini.
 It is based on the 1890 novel "Beatrice" by H. Rider Haggard and is also known by the alternative title of The Stronger Passion.
 It is a separate film from Brenon's 1919 "Beatrice" which starred Francesca Bertini as Beatrice Portinari.
Beau Ideal is a 1931 American pre-Code adventure film directed by Herbert Brenon and released by RKO Radio Pictures.
 The film was based on the adventure novel "Beau Ideal" by P. C. Wren, the third novel in a series of five novels based around the same characters.
 Brenon had directed the first in the series, "Beau Geste", which was a very successful silent film in 1926.
 The screenplay was adapted from Wren's novel by Paul Schofield, who had also written the screenplay for the 1926 "Beau Geste", with contributions from Elizabeth Meehan and Marie Halvey.

Question: Are Curtis Bernhardt and Herbert Brenon both German film directors?
Answer: no