Severian, Siverian, Severians or Severianus may refer to:

People Ancient Rome: pagans In chronological order. Publius Juventius Celsus Titus Aufidius Hoenius Severianus (c. 67 – c. 130), Roman jurist Sextus Cocceius Severianus (fl. 145–163), Roman senator and governor Marcus Sedatius Severianus (105–161/2), Roman senator (3rd century), Roman governor, father of Marcia Otacilia Severa Flavius Severianus, son of the emperor Valerius Severus (died 313) Iulius Severianus (5th century), Latin rhetor Severianus of Damascus (fl. c. 450–480), Roman governor

Christians In chronological order. Severian and Aquila (3rd century), Christian martyrs, husband and wife Severian, Christian martyr torn apart by stones around 300 Severian, one of the Four Crowned Martyrs at the turn of the 4th century Severian (died 320), a Roman Christian soldier who was one of the Forty Martyrs of Sebaste Severian of Gabala (fl. c. 400), Christian bishop and a popular preacher in Constantinople Severian of Scythopolis (died 453), Christian bishop in Palestine and martyr Severian Baranyk (1889–1941), Ukrainian Greek Catholic priest and martyr in Ukraine Severian Yakymyshyn (1930–2021), Ukrainian Greek Catholic priest in Canada

Groups Severians, a tribe or tribal union of early East Slavs from the 8th to the 10th centuries Severian Encratites, a sect of gnostic Encratites, a 2nd-century sect of Christians Severians (miaphysite faction), followers of the 6th-century Patriarch Severus of Antioch

Fictional characters Severian (character), narrator and protagonist of Gene Wolfe's novels The Book of the New Sun and The Urth of the New Sun Siverian, one of the characters in Roderick the Last of the Goths, an 1814 epic poem by Robert Southey

Other Severian, anything of or related to Severia, medieval region in Eastern Europe named after the Severian tribe

See also Severin (disambiguation) Severinus (disambiguation) Severiana (disambiguation) Severiano (disambiguation) Severan (disambiguation) Siberian (disambiguation)