Fyodor Sologub (Russian: Фёдор Сологу́б, born Fyodor Kuzmich Teternikov, Russian: Фёдор Кузьми́ч Тете́рников; March 1 [O.S. February 17] 1863 – December 5, 1927) was a Russian Symbolist poet, novelist, playwright and essayist. He was the first writer to introduce the morbid, pessimistic elements characteristic of European fin de siècle literature and philosophy into Russian prose.