Shadow (Polish: "Cień" ) is a 1956 Polish film directed by Jerzy Kawalerowicz.
 It was entered into the 1956 Cannes Film Festival.
Mother Joan of the Angels (Polish: Matka Joanna od Aniołów , also known as The Devil and the Nun) is a 1961 drama film on demonic possession, directed by Jerzy Kawalerowicz, based on a novella of the same title by Jarosław Iwaszkiewicz.
 The film won the Special Jury Prize at the 1961 Cannes Film Festival.
Richard Marquand (22 September 1937 – 4 September 1987) was a Welsh film director, best known for directing 1983's "Return of the Jedi".
 He also directed the critically acclaimed 1981 drama film "Eye of the Needle" and the 1985 thriller "Jagged Edge".
Jerzy Kawalerowicz (19 January 1922 – 27 December 2007) was a Polish film director and politician, having been a member of Polish United Workers' Party from 1954 until its dissolution in 1990 and a deputy in Polish parliament since 1985 until 1989.
Night Train (also known as Baltic Express) is the English title for Pociąg, a 1959 film directed by Jerzy Kawalerowicz.
Quo Vadis is a 2001 Polish film directed by Jerzy Kawalerowicz based on the book of the same title by Henryk Sienkiewicz.
 It was Poland's submission to the 74th Academy Awards for the Academy Award for Best Foreign Language Film, but was not nominated.
Matka Joanna is an album by Polish jazz trumpeter and composer Tomasz Stańko recorded in 1994 and released on the ECM label.
 The music was inspired by Jerzy Kawalerowicz's 1961 movie "Matka Joanna od Aniołów".
Austeria (a.k.a.
 The Inn) is a Polish feature film directed by Jerzy Kawalerowicz, produced by "Zespół Filmowy "Kadr"" and released in 1983.
Death of a President (Polish: Śmierć prezydenta ) is a 1977 Polish drama film directed by Jerzy Kawalerowicz.
 It was entered into the 28th Berlin International Film Festival, where it won the Silver Bear for an outstanding artistic contribution.
 The film was also selected as the Polish entry for the Best Foreign Language Film at the 51st Academy Awards, but was not accepted as a nominee.
The Real End of the Great War is the English title for "Prawdziwy koniec wielkiej wojny", a film released in 1957, directed by Jerzy Kawalerowicz.

Question: Were Jerzy Kawalerowicz and Richard Marquand both from Wales?
Answer: no