Defunct Franz Pfemfert (20 November 1879, Lötzen, East Prussia (now Giżycko, Poland) – 26 May 1954, Mexico City) was a German journalist, editor of Die Aktion, literary critic, politician and portrait photographer.

Pfemfert occasionally wrote under the pseudonym U. Gaday (derived from Russian "ugadaj", dt: "guess").

In 1911 he married Alexandra Ramm, who had moved to Berlin from Russia and who was involved in Russian translations.

[2] He subsequently became close friends with Leon Trotsky, even though he maintained quite distinct political views.

[3] After the Nazi seizure of power, Pfemfert fled to Karlovy Vary, Czechoslovakia.