Sextus Cocceius Severianus was a Roman senator who flourished during the reign of Antoninus Pius. An unpublished military diploma attests that he was governor of Roman Arabia on 12 August 145;[1] Severianus was promoted to suffect consul in 147, with first Tiberius Licinius Cassius Cassianus then Gaius Popilius Carus Pedo as his colleague.[2] Between 161 and 163 he was Proconsul of Africa.[3]
He married Caesonia; their known children include a son, Sextus Cocceius Severianus; Sextus Cocceius Vibianus (flourished c. 204), is a known grandson.[4]