Leonid Breitfuß 1864–1950 Source: Wikimedia Commons About Leonid Breitfuß Russian naturalist (1864-1950) People from the Same Era Ferdinand I of Bulgaria 1861–1948 botanist, entomologist, military officer, military personnel, ornithologist, ruler, writer, zoological collector, zoologist Vienna Pál Joanovich 1860–1934 politician, secretary of state Pest Philéas Lebesgue 1869–1958 children's writer, essayist, journalist, literary critic, novelist, poet, translator La Neuville-Vault Henri Claude 1869–1945 neurologist, physician, psychiatrist, university teacher Paris Jan Derk Domela Nieuwenhuis Nyegaard 1870–1955 politician, writer Amsterdam Walter E. Lord b. 1856 politician