Cassius
Cassius is a boys' name of Latin origin meaning “hollow, vain.” It ranked #582 in the United States in 2025. Cassius is an ancient Roman family name most famously borne by Cassius Clay, Muhammad Ali's birth name.
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how do you pronounce Cassius?
KASH-us
where does the name Cassius come from?
A Roman family name, from the ancient gens Cassia.
It carries the weight of Roman history through Gaius Cassius Longinus, one of Julius Caesar's assassins.
how popular is this name?
Cassius has appeared in the US top 1,000 in 32 years since 1880, and fell outside it for 114. It peaked at #425 in 1880, and ranked #582 in 2025.
See the milestone years
| Year | Rank |
|---|---|
| 2025 | #582 |
| 2024 | #569 |
| 2023 | #575 |
| 2022 | #548 |
| 2021 | #487 |
| 2020 | #488 |
| 2019 | #514 |
| 2018 | #594 |
| 2017 | #582 |
| 2016 | #600 |
| 1890 | #814 |
| 1880 | #425 |
Source: SSA National Baby Names Dataset (through 2025). Years absent from the table are years Cassius fell outside the top 1,000.
the history of Cassius
Cassius was the name of one of Julius Caesar's assassins, and the boxer Muhammad Ali was born Cassius Clay.
who are famous people named Cassius?
- Muhammad Ali (born Cassius Clay, boxing legend)
- Gaius Cassius Longinus (Roman senator)
- Cassius Marsh (NFL player)
what are the nicknames and variants of Cassius?
Nicknames
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.
quick answers about Cassius
What does the name Cassius mean?
Cassius means “hollow, vain”.
What is the origin of the name Cassius?
Cassius comes from the Latin naming tradition.
How popular is the name Cassius?
Cassius ranked #582 in the US in 2025, according to Social Security data. Its best year was 1880, at #425, and it has spent 32 years in the top 1,000 since 1880.
Is Cassius a boy or girl name?
Cassius is primarily a boys' name.
How do you pronounce Cassius?
Cassius is pronounced KASH-us, with 2 syllables.
Last updated · Curated by HushName editorial
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