Cassius

Cassius may refer to:

==People== ===Ancient world=== Cassius, an ancient Roman family name: see Cassia gens Gaius Cassius Longinus (died 42 BC), Roman senator and a leader of Julius Caesar's assassination Avidius Cassius (130–175), usurper Roman emperor Cassius Chaerea, 1st-century Roman army soldier and officer in the Praetorian Guard and assassin of Emperor Caligula Cassius Dio (c. AD 155 or 163/164–after 229), Roman historian Cassius Longinus (disambiguation) Cassius of Clermont (died c. 260), Roman senator and Christian martyr Cassius of Narni (died 558), Bishop of Narni