The Collaborative International Dictionary of English v.0.48:

Dostoevski \Dostoevski\, Dostoyevski \Dostoyevski\prop. n.
   Russian author Fyodor Mikhailovich Dostoevski; born 1821,
   died 1881.

   Syn: Fyodor Mikhailovich Dostoevski.
        [WordNet 1.5] Dostoevskian

WordNet (r) 3.0 (2006):

Dostoevski
    n 1: Russian novelist who wrote of human suffering with humor
         and psychological insight (1821-1881) [syn: Dostoyevsky,
         Dostoevski, Dostoevsky, Feodor Dostoyevsky, Fyodor
         Dostoyevsky, Feodor Dostoevski, Fyodor Dostoevski,
         Feodor Dostoevsky, Fyodor Dostoevsky, Feodor
         Mikhailovich Dostoyevsky, Fyodor Mikhailovich
         Dostoyevsky, Feodor Mikhailovich Dostoevski, Fyodor
         Mikhailovich Dostoevski, Feodor Mikhailovich Dostoevsky,
         Fyodor Mikhailovich Dostoevsky]