Ian Barry (director)
Ian Barry is an Australian director of film and TV.
Ralph Nelson
Ralph Nelson (August 12, 1916 – December 21, 1987) was an American film and television director, producer, writer, and actor.
He was best known for directing "Lilies of the Field" (1963), "Father Goose" (1964), and "Charly" (1968), films which won Academy Awards.
John Farrell (businessman)
John Farrell is the director of YouTube in Latin America.
Zekial Marko
Zekial Marko( 1933–2008) was an American writer who specialised in crime stories, often under the pen name of John Trinian.
He was arrested during filming of" Once a Thief" and spent some time in prison.
Once a Thief (1935 film)
Once a Thief is a 1935 British, black- and- white, crime film directed by George Pearson and starring John Stuart as Roger Drummond.
It was produced by British& Dominions Film Corporation and Paramount British Pictures.
Once a Thief (1965 film)
Once a Thief is a 1965 crime film directed by Ralph Nelson and starring Alain Delon, Ann-Margret, Van Heflin and Jack Palance.
It was written by Zekial Marko, based on his novel.
The movie was known in France as Les Tueurs de San Francisco.
Nelson won the OCIC award at the 1965 San Sebastián International Film Festival for the film.
Once a Thief (1950 film)
Once a Thief is a 1950 American crime film noir directed by W. Lee Wilder starring Cesar Romero, June Havoc, Marie McDonald and Lon Chaney Jr..
Dana Blankstein
Dana Blankstein- Cohen( born March 3, 1981) is the director of the Israeli Academy of Film and Television.
She is a film director, and an Israeli culture entrepreneur.
Peter Levin
Peter Levin is an American director of film, television and theatre.
Michael Govan
Michael Govan( born 1963) is the director of the Los Angeles County Museum of Art since 2006.
Prior to this, Govan worked as the director of the Dia Art Foundation in New York City.

Question: What nationality is the director of film Once A Thief (1965 Film)?
Answer: American