Parrhasius (Greek: Παρράσιος) may refer to: - Persons: - Parrhasius (painter), a famous painter who worked in Athens in the late 5th century BC - Janus Parrhasius (1470–1522), Italian humanist scholar - Parrhasius (son of Lycaon), in mythology, a son of Lycaon, from whom Parrhasia (Arcadia) was believed to have derived its name - Taxonomy: - Parrhasius (butterfly), a butterfly genus