Cassius
Cassius is a boys' name of Latin origin meaning “hollow, vain.” It ranked #583 in the United States in 2025. Cassius is an ancient Roman family name most famously borne by Cassius Clay, Muhammad Ali's birth name.
how do you pronounce Cassius?
KASH-us
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what does Cassius mean?
The name Cassius means “hollow, vain.” It comes from the Latin language tradition.
Cassius is an ancient Roman family name most famously borne by Cassius Clay, Muhammad Ali's birth name. It carries the weight of Roman history through Gaius Cassius Longinus, one of Julius Caesar's assassins.
where does the name Cassius come from?
Wiktionary traces Cassius only to the Roman gens Cassia, an ancient Roman family, without giving a specific meaning — so the hollow or vain gloss given elsewhere is not confirmed by anything retrieved here.
the history of Cassius
The sources found describe Cassius purely as a Roman nomen belonging to the gens Cassia; they say nothing about the historical figures — such as Julius Caesar's assassin or Muhammad Ali's birth name — commonly associated with it elsewhere.
how popular is this name?
| Year | Rank |
|---|---|
| 2025 | #583 |
| 2024 | #569 |
| 2023 | #576 |
| 2022 | #549 |
| 2021 | #487 |
| 2020 | #488 |
Source: SSA National Baby Names Dataset
what are the nicknames and variants of Cassius?
Nicknames
who are famous people named Cassius?
- Muhammad Ali (born Cassius Clay, boxing legend)
- Gaius Cassius Longinus (Roman senator)
- Cassius Marsh (NFL player)
what names are similar to Cassius?
what names go well with Cassius?
Sibling names that share Cassius's rhythm and register without echoing it too closely.
Last reviewed April 30, 2026 · Curated by HushName editorial
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