Fyodor was the first name of the Russian novelist commonly known in English as Fyodor Dostoevsky.
He was born Fyodor Mikhailovich Dostoevsky in Moscow in 1821. The patronymic Mikhailovich means “son of Mikhail,” referring to his father, Mikhail Dostoevsky, a physician at Mariinsky Hospital.
English-language sources usually use the transliteration Fyodor Dostoevsky, while other systems render the name as Fedor Dostoyevsky or Fyodor Dostoyevsky. These spelling variations refer to the same writer, not different people.
His name is also sometimes shortened in discussions of Russian literature, but the canonical English form includes both Fyodor and the surname Dostoevsky. The question asks for his given name, not his patronymic or family name.