I tried googling http://www.google.com/search?hl=nt&lr;=&q;=%22%D1%82%D0%B5%D0%BE%D0%B4%D0%BE%D1%80+%D0%94%D0%BE%D1%81%D1%82%D0%BE%D0%B5%D0%B2%D1%81%D0%BA%D0%B8%D0%B9+%22&start;=10&sa;=N - Tеодор Достоевский would be cyrillics of this, presumably? - and the results I glanced at were stuff that had F. Dostoyevsky's titles mentioned. Where did you come across such a variant? Феодор (Feodor) is an older (Russian) version of Фёдор, and I think Теодор (Teodor) has never been used in Russia.  (woof!)