Fortunius (Italicized Fortunio) may be
a Latin patronymic Cassius Fortunius, son of Fortunato count of Borja (b. 685) a given name Fortunius Licetus (1577-1657) a character in Philodoxus by Leon Battista Alberti other Papilio fortunius, a species of Papilio Fortunio (novel), an 1836 novel by Théophile Gautier Fortunio (opera), a 1907 opera by André Messager Les Cahiers du Sud, a former French literary journal founded in 1914 as Fortunio (renamed in 1925)