Isaj Dratwer
Isaj Dratwer (born January 1, 1905, Warsaw, died 1985) was a Polish Jewish bacteriologist and esperantist. In the Esperanto movement, Dratwer was a strong advocate, President of the Esperanto Academy, and committee secretary in  1927 and 1931. He often published articles or letters in the "Heroldo de Esperanto" ("Esperanto Herald"), "Pola Esperantisto" ("Polish Esperantist") and others. He also translated Russian-language novels by Romanov in 1932. He survived the Nazi concentration camps. In the 1950s he was secretary-general of the Polish Esperanto Association and in the 1960s he was president of the Esperanto League of Israel. Isaj