L. L. Zamenhof

L. L. Zamenhof was the creator of Esperanto, the most widely used constructed international auxiliary language.

15 December 1859

Born on the same birth day (15 December): Daniel Ochefu • Ernest Ashworth • Klaus Rifbjerg • Michel Richard Delalande • Muriel Rukeyser • P. J. Byrne • Tony Leon

Born in the same month (December 1859): Georges Seurat • Gustave Kahn • John Jellicoe, 1st Earl Jellicoe • Paul César Helleu • Venustiano Carranza • William Stephens (American politician)