Claudianus may refer to:
People Marcus Livius Drusus Claudianus (fl. 1st century BC), a senator in Roman Republic and father of Livia, Roman empress and Augustus' third wife Claudianus (1st century), an Egyptian strategos of the nome, to whom was addressed in Papyrus Oxyrhynchus 51 (written in 173) Claudius Claudianus (c. 370 – c. 404), an Egypto-Roman poet born in Alexandria Claudianus Ecdidius Mamertus (died c. 473), a Gallo-Roman theologian and a brother of Saint Mamertus Osbern Pinnock of Gloucester or Claudianus Osbernus Pinnuc (1123–1200), an English Benedictine monk of St Peter's Abbey, Gloucester Claudianus Ostern, the pen name of the Slovak preacher Edmund Pascha (1714–1772)
Locations Mons Claudianus, a Roman quarry in the eastern desert of Egypt
Biology Hesperia claudianus (Latreille, ), a synonym of Carystus phorcus, a butterfly species Carystus phorcus claudianus (Latreille, ), a subspecies of Carystus phorcus Harma claudianus (Druce, 1874), a synonym of Euryphura chalcis, a butterfly species