Ivan Lukyanovich Solonevich was a Russian philosopher, historian, writer, editor, publisher, publicist and conservative political activist.

Ivan Francis Southall AM, DFC was an Australian writer best known for young adult fiction. He wrote more than 30 children's books, six books for adults, and at least ten works of history, biography or other non-fiction.

Ivan Steshenko was a Ukrainian civic and political activist, writer, translator, member of the Ukrainian government, and member of the Shevchenko Scientific Society. He had several pen-surnames: Serdeshny, Sichovyk, Svitlenko, and Stepura.

Ivan Stodola (10 March 1888 in Liptószentmiklós – 26 March 1977 in Piešťany) was Slovak dramatist and writer.

Ivan Zakharovich Surikov was a Russian self-taught peasant poet, best known for his folklore-influenced ballads, some of which were put to music by well-known composers, while some became real folk songs.

Ivan Sviták was a Czech philosopher, critic, and poet who ranked among Europe's most prominent proponents of Marxist humanism.

Ivan Oleksiyovych Svitlichny was a Ukrainian poet, literary critic, and Soviet dissident.

Ivan Romanovich Tarkhanov or Ivane Tarkhnishvili was a Georgian physiologist and science populariser from the Tarkhan-Mouravi noble family. He led the Department of Physiology at the Academy of Military Medicine from 1877 to 1895 and authored a slew of articles on physiology for the Brockhaus and Efron Encyclopedic Dictionary. Among his numerous contributions was the discovery of the skin galvanic reflex (1889). However, Tarkhnishvili's most significant contribution was the discovery of the influence of X-rays on the central nervous system, animal behavior, the heart and circulation, and embryonic development (1896-1903). Indeed, these works have given rise to a new field in science as Radiobiology.

Ivan IV Vasilyevich, commonly known as Ivan the Terrible, was Grand Prince of Moscow and Sovereign of all Russia from 1533, and the first crowned Tsar of all Russia from 1547 until his death in 1584.

Ivan Timofeevich Kokorev (Russian Иван Тимофеевич Кокорев) (September 6, 1825 - June 14, 1853) was a Russian writer.