Question: Were Arvid E. Gillstrom and Edgar Reitz both German filmmakers?

Context articles: Cardillac (film)
Trip to Vienna
Home from Home (2013 film)
Arvid E. Gillstrom
Oberhausen Manifesto
Germany in Autumn
Just an Echo
Edgar Reitz
The Tailor from Ulm
Please (film)

Cardillac is a 1969 West German drama film directed by Edgar Reitz, starring Hans-Christian Blech and Catana Cayetano.
 It tells the story of a goldsmith who is so obsessed with his own craft that he murders his customers.
 The film is a modern adaptation of E. T. A. Hoffmann's novella "Mademoiselle de Scuderi".
Trip to Vienna (German: Die Reise nach Wien) is a 1973 German drama film directed by Edgar Reitz and starring Elke Sommer, Hannelore Elsner and Mario Adorf.
 During the closing months of the Second World War, two small-town German women discover some money in an attic and decide to spend it on a trip to Vienna.
Home from Home (German: Die andere Heimat – Chronik einer Sehnsucht ) is a 2013 German drama film directed by Edgar Reitz.
 It was screened out of competition at the 70th Venice International Film Festival.
 It is shot in black-and-white, but there are some colour sequences.
 It is a prequel to the "Heimat" film series and concerns the Simon family living in the fictional Hunsrück village of Schabbach from 1840–1844.
Arvid E. Gillstrom (13 August 1889 – 21 May 1935), was a Swedish film director and screenwriter.
 He was born "Arvid Evald Gyllström" in Annedal, Gothenburg, Sweden and died in Hollywood, California.
The Oberhausen Manifesto was a declaration by a group of 26 young German filmmakers at the International Short Film Festival Oberhausen, North Rhine-Westphalia on 28 February 1962.
 The manifesto was a call to arms to establish a "new German feature film".
 It was initiated by Haro Senft and among the signatories were the directors Alexander Kluge and Edgar Reitz.
 The manifesto was associated with the motto ""Papas Kino ist tot"" (Papa's cinema is dead), although this phrase does not appear in the manifesto itself.
Germany in Autumn (German: "Deutschland im Herbst" ) is a 1978 West German omnibus film about the 1970s terrorist incidents known as German Autumn.
 The film is composed of contributions from different filmmakers, including Rainer Werner Fassbinder, Alexander Kluge, Edgar Reitz and Volker Schlöndorff.
 It was entered into the 28th Berlin International Film Festival, where it won a Special Recognition award.
Just an Echo is a 1934 Paramount short starring Bing Crosby and directed by Arvid E. Gillstrom.
 This was the second of two short films Crosby made for Paramount in May / June 1933, the other being Please.
Edgar Reitz (born 1 November 1932) is a German filmmaker and Professor of Film at the Staatliche Hochschule für Gestaltung (State University of Design) in Karlsruhe.
The Tailor from Ulm (German: Der Schneider von Ulm ) is a 1979 West German drama film directed by Edgar Reitz of Heimat fame.
 It is the true story of a German pioneer aviator, Albrecht Berblinger, in the late 18th century.
 It was entered into the 11th Moscow International Film Festival.
Please is a 1933 short musical comedy film directed and produced by Arvid E. Gillstrom.
 It stars Bing Crosby as himself along with Vernon Dent and Mary Kornman.