Felzen (Felsen) Yuri (real name: Nikolai Bernhardovich Freidenstein) (1895, Saint Petersburg — 1943, Germany) — writer, critic.

Yuri Felzen was born into the family of a doctor. In 1912, he graduated from the Faculty of Law of Saint Petersburg University.

From 1918, he lived in Riga; in 1922–1924 he was in Germany, and from 1924 he lived in France.

His first publication appeared in the journal “Novy Korabl” (“New Ship”) in the mid-1920s.

He was the author of the novels: Deception (Paris, 1930) and Happiness (Berlin, 1932) and the book: Letters about Lermontov (Paris, 1936)

His prose and reviews were published in journals such as “Sovremennye zapiski”, “Chisla”, “Krug”, and other periodicals.

In 1942, he was arrested while attempting to cross the French–Swiss border.