L. L. Zamenhof L. L. Zamenhof Ludwik Lejzer Zamenhof (; , ; – ), credited as L. L. Zamenhof and sometimes as the pseudonymous Dr. Esperanto, was a Polish-Jewish ophthalmologist and the creator of Esperanto, the most successful constructed language in the world. He grew up fascinated by the idea of a world without war and believed that this could happen with the help of a new international auxiliary language, which he first developed in 1873 while still in school. Zamenhof was born on 15 December (3 December OS) 1859, the son of Markus Zamenhof (27 January 1837 - 29 November 1907) and
Ludwik Dorn Ludwik Dorn Ludwik Dorn (, born 5 June 1954 in Warsaw) is a Polish conservative politician, former Deputy Prime Minister and member of Sejm elected on 5 November 2007. He was born Ludwik Dornbaum, to Jewish parents, Henryk Dornbaum, a socialist activist and Alina née Kluger, a doctor. All of his father's family was murdered during the Holocaust. In the 1960s Dornbaum family changed their name to Dorn. He was raised agnostic, but he converted to Roman Catholicism at the age of 51. From 31 October 2005 to 7 February 2007 he was Minister of Interior and Administration, resigned after