Marcel Varnel (16 October 1892 – 13 July 1947) was a film director.
 He was born Marcel Hyacinthe le Bozec in Paris, France.
John David Landis (born August 3, 1950) is an American film director, screenwriter, actor, and producer.
 He is best known for the comedy films that he has directed such as "National Lampoon's Animal House" (1978), "The Blues Brothers" (1980), "An American Werewolf in London" (1981), "Trading Places" (1983), "¡Three Amigos!
" (1986), "Coming to America" (1988) and "Beverly Hills Cop III" (1994), and for directing Michael Jackson's music videos for "Thriller" (1983) and "Black or White" (1991).
All In is a 1936 British sports comedy film directed by Marcel Varnel and starring Ralph Lynn, Gina Malo and Garry Marsh.
 The owner of a racing stables has high hopes of winning The Derby, but fate intervenes.
 It is also known by the alternative title Tattenham Corner.
South American George is a 1941 British, black-and-white, comedy film, directed by Marcel Varnel and starring George Formby in a dual role, Linden Travers, Enid Stamp-Taylor, Felix Aylmer, Ronald Shiner as Swifty, Mavis Villiers and Herbert Lomas.
 It was produced by Columbia (British) Productions.
Royal Cavalcade, also known as Regal Cavalcade, is a 1935 British, black-and-white, drama film directed by six separate directors: Thomas Bentley (Supervising Director), Herbert Brenon, Norman Lee, Walter Summers, W.P. Kellino and Marcel Varnel.
 The film features Marie Lohr, Hermione Baddeley, Owen Nares, Robert Hale, Austin Trevor, James Carew, Edward Chapman and Ronald Shiner as the Soldier in Trenches.
 The film was presented by Associated British Pictures Corporation.
Get Cracking is a 1943 British comedy war film, directed by Marcel Varnel starring George Formby, with Dinah Sheridan and Ronald Shiner.
 It was produced by Marcel Varnel and Ben Henry for Columbia (British) Productions, a subsidiary of the American studio.
Band Waggon is a 1940 British comedy film directed by Marcel Varnel and starring Arthur Askey, Richard Murdoch and Moore Marriott.
 It was based on the BBC radio show "Band Waggon".
Neutral Port is a 1940 British war film directed by Marcel Varnel and starring Will Fyffe, Leslie Banks, Yvonne Arnaud, and Phyllis Calvert, with a supporting role for Wally Patch.
The Frozen Limits is a 1939 British comedy western film directed by Marcel Varnel and starring Jimmy Nervo, Bud Flanagan, Teddy Knox, Chesney Allen and Charlie Naughton a group of entertainers commonly known as The Crazy Gang.
 It was written by Val Guest.
Freedom of the Seas is a 1934 British war film directed by Marcel Varnel and starring Clifford Mollison, Wendy Barrie and Zelma O'Neal.
 It was adapted by Roger Burford from the English play of the same name by Walter C. Hackett.
 It is also notable as David Lean's first film credit, as focus puller.
 It was French director Varnel's first film in Britain following a spell in Hollywood.

Question: Were both Marcel Varnel and John Landis French?
Answer: no