A pen name, also called a nom de plume or a literary double, is a pseudonym (or, in some cases, a variant form of a real name) adopted by an author and printed on the title page or by-line of their works in place of their real name. A pen name may be used to make the author's name more distinctive, to disguise the author's gender, to distance the author from their other works, to protect the author from retribution for their writings, to merge multiple persons into a single identifiable author, or for any of a number of reasons related to the marketing or aesthetic presentation of the work. The author's real identity may be known only to the publisher or may become common knowledge. Etymology The French-language phrase is occasionally still seen as a synonym for the English term "pen name", which is a "back-translation" and originated in England rather than France. H. W. Fowler and F. G. Fowler, in The King's English state that the term nom de plume evolved in Britain where people wanting a literary phrase failed to understand the term nom de guerre, which already existed in French. Since means "war" in French, did not make sense to the British, who did not understand the French metaphor. See also French phrases used by English speakers. Western literature Europe and the United States An author may use a pen name if their real name is likely to be confused with that of another author or other significant individual. For instance, in 1899 the British politician Winston Churchill wrote under the name Winston S. Churchill to distinguish his writings from those of the American novelist of the same name. An author may use a pen name implying a rank or title which they have never actually held. William Earl Johns wrote under the name "Capt. W. E. Johns" although the highest army rank he held was acting lieutenant and his highest air force rank was flying officer. Authors who regularly write in more than one genre may use different pen names for each, either with no attempt to conceal a true identity or even after their identity is known. Romance writer Nora Roberts writes erotic thrillers under the pen name J. D. Robb (such books were originally listed as by "J. D. Robb" and are now titled "Nora Roberts writing as J. D. Robb"); Scots writer