Name Awesome

Cassius

#583 in 2025Boys' name

Possibly empty, vain

Cassius has been given to 9,766 babies in the U.S. since 1880. In 2025 it ranked #583 of 13,926 boys’ names in use. Its peak year was 2021, with 607 recorded.

Babies named Cassius, 2025

1 in 6,580

Cassius over time, 1880–2025

BoysGirls
020040060080018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Cassius: meaning, origin, and history

Possibly empty, vain

Latin

What Cassius means

Cassius may mean “empty, vain”.

Dictionary etymologyReferences, data & attribution

Borrowed from Latin Cassius, a Roman name derived from the gens Cassia.

Excerpt from Wiktionary: Cassius (English) · CC BY-SA 4.0

Wiktionary material is available under CC BY-SA 4.0.

Origin, language, and formation

Cassius is used in English. Its origins include Latin.

Cassius comes through Latin Cassius.

Pronunciation and spelling

In English, Cassius is pronounced /ˈkæsi.əs/.

American usage and historical context

In the United States, 9,736 boys were recorded with the name Cassius between 1880 and 2025. Its highest annual count was 607 in 2021; its best national rank was #430 in 1880.

Over 5 years its rank fell, from #488 in 2020 to #583 in 2025. Over 10 years its rank rose, from #644 in 2015 to #583 in 2025.

In the United States, 30 girls were recorded with the name Cassius between 2017 and 2023. Its highest annual count was 8 in 2017; its best national rank was #11,869 in 2017.

How common is Cassius?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 6,580
504 of 3,315,165 births
Among boys only
1 in 3,390
0.03% of boys
Rank, 2025
#583
of 13,926 boys’ names in use
Coin-flip room size
4,560 kids
Even odds of a second one

Where Cassius sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 1001%
School of 5007%

Put another way: gather 4,560 children born in 2025 and it's an even bet that one of them is another Cassius. In a class of 30 the chance is Under 1%.

When Cassiuss were born

Half of everyone ever recorded as Cassius was born before 2016 — so the typical Cassius is around 9 today.

Median birth year
2016
About 9 years old
Biggest decade
2010s
37.3% of all use
Born in the last 25 years
83.0%
A modern name
Recorded since 1950
9,301
People you could plausibly meet
Choose a decade

2010s — 37.3% of all recorded uses (3,635).

Is Cassius rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
−14
Places dropped
Rank vs 5 years ago
−95
Places dropped
Rank vs 10 years ago
+61
Places climbed
Births vs 10 years ago
1.24×
More babies than then
Share of its own peak
83.0%
Peak was 2021 (607)
Years since peak
4
Years
Year-to-year steadiness
Shifting
13.8% average annual change
Best rank ever
#430
1880

Spellings of Cassius

Cassius is the most-used spelling, taking 49.0% of the 19,880 babies given a near-identical spelling.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Cassius is used

Across 2016–2025, Cassius was most concentrated in Washington — about 1 in 1,333 boys, against 1 in 3,150 across all states with data. It was least common in Mississippi (1 in 11,111).

975 per 100,000

Most concentrated

  1. 1Washington1 in 1,333
  2. 2New Mexico1 in 1,493
  3. 3Colorado1 in 1,613
  4. 4Hawaii1 in 1,613
  5. 5Oregon1 in 1,786
  6. 6Michigan1 in 2,041
  7. 7Indiana1 in 2,128
  8. 8Arizona1 in 2,564

Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings.

Geographically, Cassius is somewhat regional — more concentrated than 30% of the names used widely enough to compare. See the most regional names

Cassius around the world

Where Cassius ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    1996–2025
    #319
    in 2025
  • Scotland
    2017–2024
    #727
    in 2024
  • Northern Ireland
    2021–2021
    #433
    in 2021
  • France
    1923–2024
    #3,942
    in 2024
  • Canada
    1998–2024
    #857
    in 2024
  • South Australia
    1977–2012
    #385
    in 2012

Popularity data from Office for National Statistics, National Records of Scotland, Northern Ireland Statistics and Research Agency, Institut national de la statistique et des études économiques, Statistics Canada and Consumer and Business Services (South Australia). ONS, NRS, NISRA data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.

Notable people named Cassius

People whose public names include Cassius, backed by Wikidata given-name records and ordered by linked Wikimedia pages. The name may be a middle name.

People data from Wikidata (CC0). Fame is measured, not judged — the order reflects how widely each person is documented, not the U.S. birth records popularity this page is otherwise about.

Cassius in other languages

Cross-language forms and variants of Cassius. Linked forms have their own page here.

CasioCassioKasjusz

Variant forms from Wikidata (CC0). Most are used mainly outside the United States; U.S. birth records statistics cover US usage only.

Cassius by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#583
Trend vs 5 yrs ago
Down 95
Best rank ever
#430
1880
Peak year
2021
607 that year
First recorded
1880
Last recorded
2025
All-time count
9,736
Count in 2025
504

As a girl's name

Rank in 2025
Unranked
Trend vs 5 yrs ago
—
Best rank ever
#11,869
2017
Peak year
2017
8 that year
First recorded
2017
Last recorded
2023
All-time count
30
Count in 2025
Under 5

Names similar to Cassius

Matched on shared beginnings and endings, similar length, and comparable popularity.

CashiusCasimirCaspianCastielCassidyCasperCassianCashtonDarriusCasonCasenLuciusCaseAloysiusJuniusLadariusIgnatiusCasimerCasimiroOctaviusCassielAdariusCashMarius

Names with a curve like Cassius

Not spelling — timing. These names rose, peaked and faded in the same years as Cassius, so they read as being from the same moment even when they look nothing alike.

EdenRoninLeonidasKysonJasiahMemphisZekeAyaanMakaiSorenRowenMatthias

Sibling names for Cassius

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Cassius

Top names of 2021, Cassius's peak yearThe 2020s in fullOther names that peaked in 1880Boys' names starting with CAncient Roman NamesCool Boy NamesLatin Boy NamesShakespeare Names