Siegfried Kapper was the literary pseudonym of Isaac Salomon Kapper (21 March 1821, Smíchov – 7 June 1879, Prague), a Bohemian-born Austrian writer of Jewish origin. Born in Smichow, Kapper studied medicine at Prague University, later completing a Ph.D. at the University of Vienna. Kapper wrote excellent fairy tales and poems, and was one of the leading figures of Czech-Jewish assimilation. Kapper wrote in both German and Czech. He translated Mácha's Máj into German for the first time (1844).