Question: Did both Philip Larkin and Hans Fallada have pseudonyms?

Context articles: Relationships that influenced Philip Larkin
Jeder stirbt für sich allein (1962 film)
Hans Fallada Prize
Little Man, What Now? (1933 film)
Little Man, What Now? (novel)
Selected Letters of Philip Larkin, 1940–1985
Philip Larkin
Hans Fallada
Every Man Dies Alone
Fallada: The Last Chapter

Throughout the life of the poet Philip Larkin a number of women had important roles which were notable influences on his poetry.
 Since Larkin's death biographers have highlighted the importance of female relationships on Larkin: when Andrew Motion's biography was serialised in the Independent in 1993, the second instalment of extracts was dedicated to the topic.
 In 1999 Ben Brown's play "Larkin with Women" dramatised Larkin's relationships with three of his lovers, and more recently writers such as Martin Amis have continued to comment on this subject.
Jeder stirbt für sich allein ("Everyone Dies Alone") is a 1962 West German made for television political drama film based on a best-selling novel by Hans Fallada, itself based on the true story of a working class couple, Otto and Elise Hampel, who committed acts of civil disobedience against the government of Nazi Germany and were executed.
 Directed by former German Resistance member Falk Harnack—whose brother, sister-in-law and cousins were executed during the Nazi regime—it was the first screen adaptation of Fallada's novel.
The Hans Fallada Prize is a German literary prize given by the city of Neumünster in the German state of Schleswig-Holstein.
 Since 1981 it has been normally awarded every two years to a young author from the German-speaking world.
 It is named in honor of Hans Fallada, a famous 20th-century German author known for addressing political and social problems of his day in fiction.
Little Man, What Now?
 (German:Kleiner Mann - was nun?)
 is a 1933 German drama film directed by Fritz Wendhausen and starring Hermann Thimig, Hertha Thiele and Viktor de Kowa.
 It is an adaptation of the novel of the same name by Hans Fallada.
 It was well received by contemporary critics, many of whom considered it the best German film of 1933.
 A separate American film adaptation of Fallada's novel, "Little Man, What Now?
", was released in 1934.
Little Man, What Now?
 (German title: "Kleiner Mann, was nun?")
 is a novel by Hans Fallada, which was first published in 1932, the year before Adolf Hitler's rise to power.
 The book was an immediate success in Germany, where today it is considered to be a modern classic, given its intense descriptions of the last days of the Weimar Republic.
 The book was also the breakthrough for Fallada as a writer of fiction.
The Selected Letters of Philip Larkin, 1940–1985 is a volume of Philip Larkin's personal correspondence, compiled by Anthony Thwaite, one of Larkin's literary executors, and published in 1992 by Faber and Faber, seven years after Larkin's death.
 It was followed a year later by "Philip Larkin: A Writer's Life", Larkin's official biography, written by Andrew Motion, Larkin's other literary executor.
Philip Arthur Larkin (9 August 1922 – 2 December 1985) was an English poet, novelist and librarian.
 His first book of poetry, "The North Ship", was published in 1945, followed by two novels, "Jill" (1946) and "A Girl in Winter" (1947), and he came to prominence in 1955 with the publication of his second collection of poems, "The Less Deceived", followed by "The Whitsun Weddings" (1964) and "High Windows" (1974).
 He contributed to "The Daily Telegraph" as its jazz critic from 1961 to 1971, articles gathered in "All What Jazz: A Record Diary 1961–71" (1985), and he edited "The Oxford Book of Twentieth Century English Verse" (1973).
 His many honours include the Queen's Gold Medal for Poetry.
 He was offered, but declined, the position of Poet Laureate in 1984, following the death of Sir John Betjeman.
Hans Fallada (born Rudolf Wilhelm Friedrich Ditzen; 21 July 18935 February 1947) was a German writer of the first half of the 20th century.
 Some of his better known novels include "Little Man, What Now?
" (1932) and "Every Man Dies Alone" (1947).
 His works belong predominantly to the New Objectivity literary style, with precise details and journalistic veneration of the facts.
 Fallada's pseudonym derives from a combination of characters found in the Grimm's Fairy Tales: the protagonist of "Hans in Luck" (KHM 83) and a horse named Falada in "The Goose Girl".
Every Man Dies Alone or Alone in Berlin (German: "Jeder stirbt für sich allein" ) is a 1947 novel by German author Hans Fallada.
 It is based on the true story of a working class husband and wife who, acting alone, became part of the German Resistance.
 They were eventually discovered, denounced, arrested, tried and executed.
 Fallada's book was one of the first anti-Nazi novels to be published by a German after World War II.
Fallada: The Last Chapter (German: Fallada - letztes Kapitel ) is a 1988 East German drama film directed by Roland Gräf about the life of Hans Fallada.
 It was entered into the 39th Berlin International Film Festival.