Hugo Marcus (1880–1966) was a man of many names and many identities. Born a German Jew, he converted to Islam and took the name Hamid, becoming one of the most prominent Muslims in Germany prior to World War II. He was renamed Israel by the Nazis and sent to the Sachsenhausen concentration camp before escaping to Switzerland. He was a gay man who never called himself gay but fought for homosexual rights and wrote queer fiction under the pen name Hans Alienus during his decades of exile.