D. Ross Lederman
David Ross Lederman (December 12, 1894 – August 24, 1972) was an American film director noted for his Western/action/adventure films of the 1930s and 1940s.
Starting out as an extra in Mack Sennett's Keystone Cops series, Lederman worked his way through the ranks of film production, and first made his mark as a second-unit director.
He directed several B-Western serials in the early 1930s, such as "Two-Fisted Law" and "Texas Cyclone" both 1932, in which he worked with Tim McCoy and a young John Wayne.
Becoming a full feature director in the late 1930s, Lederman specialized in action films and especially westerns, continuing to produce films with McCoy at Columbia Pictures.
Key Witness (1947 film)
Key Witness is a 1947 American film noir crime film directed by D. Ross Lederman and starring John Beal, Trudy Marshall and Jimmy Lloyd.
Hanro Smitsman
Hanro Smitsman, born in 1967 in Breda( Netherlands), is a writer and director of film and television.
The Argyle Case (1929 film)
The Argyle Case( 1929) is an all- talking pre-code murder horror film directed by Howard Bretherton and starring Thomas Meighan, H.B. Warner, Lila Lee, John Darrow and Zasu Pitts.
The film was based on a play by Harriet Ford and Harvey J. O' Higgins.
It was produced and released by Warner Bros.
The play was previously filmed as a silent in 1917," The Argyle Case".
The Argyle Case (1917 film)
The Argyle Case is a lost 1917 American silent mystery film produced by and starring Robert Warwick and directed by Ralph Ince.
It was distributed by Lewis J. Selznick through his Selznick Pictures Corporation.
The play was refilmed in 1929 as an early talkie" The Argyle Case" with Thomas Meighan and Lila Lee.
Brian Johnson (special effects artist)
Brian Johnson( born 1939 or 1940) is a British designer and director of film and television special effects.
Howard Bretherton
Howard Bretherton( 13 February 1890, Tacoma, Washington – 12 April 1969, San Diego, California) was an American film director, film editor, and the father of film editor David Bretherton.
Howard W. Koch
Howard Winchel Koch( April 11, 1916 – February 16, 2001) was an American producer and director of film and television.
Ian Barry (director)
Ian Barry is an Australian director of film and TV.
Peter Levin
Peter Levin is an American director of film, television and theatre.

Question: Do director of film Key Witness (1947 Film) and director of film The Argyle Case (1929 Film) have the same nationality?
Answer: yes