Cassius
Cassius is a boy name of Latin origin meaning “Hollow, vain”, pronounced KASH-us. It ranked #583 in the United States in 2025, given to 504 babies, and peaked at #430 in 1880. Common nicknames: Cass, Cash, Cassy.
How popular is Cassius in the United States?
Data: U.S. Social Security Administration (SSA). Based on all Social Security card applications for births in the United States.
What does Cassius mean, and where does it come from?
Cassius was a Roman family name — the gens Cassia — whose root cassus means "empty" or "hollow," though no Roman seems to have minded. History attached it first to Gaius Cassius Longinus, who organised the plot against Caesar and gave Shakespeare his "lean and hungry look." America attached it to the abolitionist Cassius Marcellus Clay and, through him, to the boxer named after him who became Muhammad Ali. The name has been in US records since 1880 and belongs today with Atticus, Augustus and Cassian: Roman, weighty, and shortened to Cass without effort.
How is Cassius used around the world?
Cassius is used in 1 languages worldwide, with 3+ international variants.
TypeMale given name
Linguistic data: Wikidata (CC0). Variants and language usage may vary by region.
What are the nicknames for Cassius?
Famous People Named Cassius
- Cassius Marcellus Clay — American abolitionist and ambassador to Russia
- Gaius Cassius Longinus — Roman senator and leading conspirator against Julius Caesar
- Cassius Marcellus Coolidge — American painter of the Dogs Playing Poker series
Similar Names to Cassius
If you like Cassius, you might also consider these names with a similar feel.
Sibling Name Ideas for Cassius
Looking for names that pair well with Cassius? Here are some sibling name suggestions that share a similar style and feel.
Frequently Asked Questions
What does the name Cassius mean?
Cassius is a boy name of Latin origin meaning "Hollow, vain." Cassius was a Roman family name — the gens Cassia — whose root cassus means "empty" or "hollow," though no Roman seems to have minded. History attached it first to Gaius Cassius Longinus, who organised the plot against Caesar and gave Shakespeare his "lean and hungry look.
How do you pronounce Cassius?
Cassius is pronounced KASH-us. Common variations include Cassio, Cassian, Kassius.
Is Cassius a boy name?
Yes, Cassius is traditionally a boy name. Popular nicknames include Cass, Cash, Cassy.