Lidia Zamenhof Lidia Zamenhof Lidia Zamenhof (; 29 January 1904–1942) was a Polish writer, publisher, translator and the youngest daughter of L. L. Zamenhof, the creator of Esperanto. She was born on 29 January 1904 in Warsaw, then in partitioned Poland. She was an active promoter of Esperanto as well as of Homaranismo, a form of religious humanism first defined by her father. Around 1925 she became a member of the Bahá'í Faith. In late 1937 she went to the United States to teach that religion as well as Esperanto. In December 1938 she returned to Poland, where she continued to teach
Ludwik Krzywicki in the organization and management of scientific bodies. He served as vice-director of the Central Statistical Office, taught at the University of Warsaw (1919–36) and other institutions of higher education, and directed the Socio-Economic Institute. During World War II he was injured during the defence of Warsaw in September 1939, and the bomb that destroyed his apartment also caused the loss of most of his papers and manuscripts. His working conditions worsened and he died of heart disease in 1941. Ludwik Krzywicki Ludwik Krzywicki (21 August 1859 – 10 June 1941) was a Polish anthropologist, economist and sociologist. One of