Fritz-Otto Busch (30 December 1890 in Lindenthal, Cologne – 5 July 1971 in Limpsfield, Surrey) was a German naval officer in the Imperial German Navy, the Reichsmarine and the Kriegsmarine, as well as a translator and a maritime and naval writer. He was a committed Nazi and had an influential role in the Nazification of the German P.E.N. from 1933 onwards. He used the pseudonyms Peter Cornelissen and Wilhelm Wolfslast.