Karen Blixen and Julian Barnes both used pseudonyms in their works.
Julian Barnes Julian Patrick Barnes (born 19 January 1946) is an English writer. Barnes won the Man Booker Prize for his book "The Sense of an Ending" (2011), and three of his earlier books had been shortlisted for the Booker Prize: "Flaubert's Parrot" (1984), "England, England" (1998), and "Arthur & George" (2005). He has also written crime fiction under the pseudonym Dan Kavanagh. In addition to novels, Barnes has published collections of essays and short stories.
Jean Bedford Jean Bedford (born 4 February 1946) is an English-born Australian writer who is best known for her crime fiction, but who has also written novels and short stories, as well as nonfiction. She is also an editor and journalist, and has taught creative writing in several universities for over 20 years.