Mikal Peder Olaus Sylten (1873 - 1964) was a Norwegian writer. Originally a typographer, from 1916 he published a periodical, Nationalt Tidsskrift. It was staunchly anti-semitic, and Sylten took up the swastika as a symbol in 1917, three years before Adolf Hitler chose to do so. He also published a pamphlet called Hvem er hvem i jødeverdenen, "Who's Who in the Jewish World", in 1925. In it, Sylten catalogued Jews or presumed Jews in Norway. New editions followed in 1932, 1938 and 1941.