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 Idzikowski Ludwik Idzikowski Ludwik Idzikowski (August 24, 1891 – July 13, 1929) was a Polish military aviator. He died during a transatlantic flight trial. Ludwik Idzikowski was born in Warsaw. He started mining studies in Liege, Belgium. At the outbreak of World War I, he was conscripted into the Russian Army. He completed aviation school in Sevastopol, and from 1916 served in air combat units as an officer pilot. After the October Revolution he managed to return to Warsaw and in November 1918 Idzikowski joined the newly-born Polish Army, in the rank of "podporucznik pilot" (flying 2nd Lieutenant). In 1919 he