Cassius is a distinctive choice, ranked #319 in 2025. Your child is likely to be the only Cassius in their class.
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UK Rank 2025
#319
US Rank #583
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About the Name Cassius
Cassius is steadily gaining in popularity, up 31 places over the past five years. Its best recorded rank was #263 in 2023, and it currently sits at #283. The name has been a consistent presence in UK records since 1996.
Cassius is fairly common in the UK, so your child is very likely to be the only Cassius in their class.
In the US it sits at #567 โ notably more popular in the UK than across the Atlantic.
Cassius Marcellus Clay โ Cassius Marcellus Clay was an American planter, politician, military officer and abolitionist who served as the United States ambassador to Russia from 1863 to 1869.
Cassius Stanley โ Cassius Jerome Stanley is an American professional basketball player for ล iauliai of the Lithuanian Basketball League (LKL).
Biographical summaries are shortened from Wikipedia and are used under the CC BY-SA 4.0 licence; those summaries remain available under that same licence.
Frequently Asked Questions
Common questions about the name Cassius
Unlikely. With around 140 UK babies named Cassius per year, your child will almost certainly be the only Cassius in their class, and possibly the only one in the whole school.
Cassius has been fairly steady, ranked #319 in 2025 against #314 in 2020. Its best recorded position was #263 in 2023.
Cassius is more popular in the UK (#283) than in the US (#567). Names with strong rankings in both countries tend to have broad cross-cultural appeal, working well for international families or those with ties to both nations.
Notable people named Cassius include: Cassius Stanley, Cassius Winston and Cassius Marsh. Short summaries for each appear below.
Cassius ranks #567 in the US top 1,000 (2024). It's recognised in America but considerably more popular in the UK.
140
UK babies named Cassius (2025)
< 1
Expected classmates with this name (class of 28)
~0.1
In a school of 600
↓ 5 places
Rank change (last 5 years)
🏫 Who else is in the room?
In a typical UK class of 28, highlighted children share the name Cassius
Almost certainly the only Cassius in the class
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UK Popularity (1996–2025)
Rank and birth count · ONS official data
US Popularity (2020–2025)
Rank · SSA official data
✨ Similar names to Cassius
Names with a similar style — each with their own classroom story
Cassius Marcellus Clay was an American planter, politician, military officer and abolitionist who served as the United States ambassador to Russia from 1863 to 1869.
Cassius Longinus may refer to: In descending chronological order: Cassius Longinus, end of 2nd century, beginning of 3rd century, historian only known through FGrHist 259 Cassius Longinus (philosopher) (213 โ 273 AD), a Greek rhetorician and philosopher Gaius Cassius Longinus (consul 30) (fl. 30โ41 AD), a Roman jurist and great grandson or nephew of Gaius Cassius Longinus, who committed tyrannicide Longinus, also called Cassius in some traditions, the Roman soldier who pierced the side of Jesus on the cross Gaius Cassius Longinus (c.