Karen Blixen and Julian Barnes both used pseudonyms in their works.
Karen Blixen Baroness Karen Christenze von Blixen-Finecke (née Dinesen; 17 April 1885 – 7 September 1962) was a Danish author who wrote works in Danish and English. She is best known under her pen names Isak Dinesen, used in English-speaking countries, and Tania Blixen, used in German-speaking countries. She also published works using the aliases Osceola and Pierre Andrézel.
Pløjeren Pløjeren (The Ploughman) is one of the early short stories by the Danish author Karen Blixen. Published in the journal "Gads danske Magasin" in October 1907 under the pen name Osceola, it followed the publication of "Eneboerne" (The Hermits) two months earlier although it was in fact the first of the two to be written.