Illarion or Ilarion (Иларион) is a Russian first name, a transliteration of the Greek name "Ἱλαρίων". It is shared by the following individuals:Illarion Pryanishnikov (1840–1894), Russian painter Count Illarion Ivanovich Vorontsov-Dashkov (1837–1916), Russian politician Illarion Ivanov-Schitz (1865–1937), Russian/Soviet architect
