L. L. Zamenhof Lodwick, who in 1652 had published an early conlang proposal. When his brother Leon became a doctor and started signing his name "Dr L. Zamenhof", Zamenhof reclaimed his birth name "Lazar" and from 1901 signed his name "Dr L. L. Zamenhof" to avoid confusion with his brother. The two L's do not seem to have specifically represented either name, and the order "Ludwik Lazar" is a modern convention. In 1905 Zamenhof received the Légion d'honneur for creating Esperanto. In 1910, Zamenhof was nominated for the Nobel Peace Prize, by four British members of parliament (including James O'Grady, Philip Snowden) and
Ludwik Hirszfeld Hirszfeld was the first to foresee the serological conflict between mother and child, which was confirmed by the discovery of the Rhesus factor. Upon this basis he developed, in the last years of his life, an "allergic" theory of miscarriage and recommended antihistamine therapy. Hirszfeld also investigated tumors and the serology of tuberculosis. His discovery of the infectious agent of paratyphoid C had far-reaching consequences for differential diagnosis. Ludwik Hirszfeld Ludwik Hirszfeld (5 August 1884 in Warsaw – 7 March 1954 in Wrocław) was a Polish microbiologist and serologist. He is considered a co-discoverer of the inheritance of ABO blood