L. L. Zamenhof in Poland, the United Kingdom, France, Hungary, the Czech Republic, Spain (mostly in Catalonia), Italy, Israel, Belgium and Brazil. There are Zamenhof Hills in Hungary and Brazil, and a Zamenhof Island in the Danube. In some Israeli cities, street signs identify Esperanto's creator and give his birth and death dates, but refer to him solely by his Jewish name Eliezer (a variant of which, El'azar, is the origin of Lazarus). Zamenhof is honored as a deity by the Japanese religion Oomoto, which encourages the use of Esperanto among its followers. Also, a genus of lichen has been named "Zamenhofia" in
Ludwik Kalkstein Ludwik Kalkstein Ludwik "Hanka" Kalkstein, also known as Ludwik Kalkstein-Stoliński, (13 March 1920, Warsaw – 26 October 1994, Munich); was one of the better known German Gestapo agents during the Warsaw Uprising as well as a Stalinist informant following the Soviet takeover of Poland. Along with his wife (Blanka Kaczorowska "Sroka"), they became traitors to the Armia Krajowa under not just one but two consecutive totalitarian regimes. Kalkstein was responsible for the arrest and execution by the Nazis of at least fourteen Polish underground officers, including the General Stefan Rowecki. Arrested by the Gestapo in April 1942 and interrogated, Kalkstein