Noah Boy
NOH-uh
“rest, comfort” · Hebrew
#2
Cassius
BoyLatin· “uncertain (Roman family name)”
- Meaning
- uncertain (Roman family name) (origin disputed)
- Origin
- Latin
- Pronunciation
- KASH-uhs
- Syllables
- 2
- US rank 2025
- #583
- US babies 2025
- 504
- Best rank
- #430 (1880)
- Peak year
- 2021
Meaning and origin of Cassius
Cassius is often said to mean “uncertain (Roman family name)”; the origin is uncertain, though it is usually linked to Latin roots.
Cassius comes from the Roman family name Cassius, whose meaning is uncertain; some link it to the Latin cassus, meaning empty or vain. Gaius Cassius Longinus was one of the leaders of the plot against Julius Caesar, and he appears as a major character in Shakespeare's Julius Caesar. The boxer Muhammad Ali was born Cassius Clay. The name feels bold, classical and cool. Cash and Cass are possible nicknames. The name was also borne by the Roman historian Cassius Dio, and it has a strong classical sound.
Popularity over time
Cassius has been given to babies in the United States since at least 1880, the first year of Social Security records. It has ranked in the top 1,000 in 32 different years. Its best national rank was #430 in 1880, and the most babies received it in 2021, when 607 were named Cassius. In 2025, 504 babies were named Cassius, and it ranked #583 nationally. Its use has been fairly steady over the past decade.
Its national rank moved from #2,062 in 1920, #3,372 in 1950, #3,650 in 1980, #1,801 in 2000, #1,006 in 2010, and #583 in 2025. Of the 9,736 US boys named Cassius since records began, 37% were born in the 2010s, its biggest decade. The 2020s come next, with 3,279 babies.
Other boys' names that peaked around the same time include Kenzo, Cannon, Kylan, Alonzo, and Kaison.
Where it is most popular (2025)
In 2025, Cassius ranked highest in Maine, Hawaii, and Washington.
| State | Rank there | Babies |
|---|---|---|
| Maine | #181 | 7 |
| Hawaii | #181 | 6 |
| Washington | #267 | 28 |
| New Mexico | #275 | 7 |
| Indiana | #342 | 22 |
Gender, sound and spelling
In the US it is used almost only for boys.
Cassius is usually pronounced KASH-uhs, with two syllables. It has seven letters, starts with C and ends in “-us”.
Middle names for Cassius
A few middle names that flow with Cassius: each avoids a matching first letter, a rhyme and a vowel clash where the names meet.
Sibling names for Cassius
Similar names
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Lists that include Cassius
Frequently asked questions
What does the name Cassius mean?
Cassius is often said to mean “uncertain (Roman family name)”; the origin is uncertain, though it is usually linked to Latin roots.
What is the origin of the name Cassius?
Cassius has Latin roots. Cassius comes from the Roman family name Cassius, whose meaning is uncertain; some link it to the Latin cassus, meaning empty or vain.
Is Cassius a popular name?
Yes. Cassius ranked #583 in the US in 2025, which makes it in the top 1,000.
Is Cassius a boy or girl name?
Cassius is mainly a boy's name. In the US it is used almost only for boys.
How do you pronounce Cassius?
Cassius is usually pronounced KASH-uhs. Stressed syllables are in capital letters.
Popularity figures come from US Social Security card applications (names given to at least five babies in a year, 1880 to 2025). How we source names and meanings