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Cassio

#9,875 in 2025Boys' name

Form of Cassius

Cassio has been given to 16 babies in the U.S. since 2024. In 2025 it ranked #9,875 of 13,926 boys’ names in use. Its peak year was 2024, with 9 recorded.

Babies named Cassio, 2025

1 in 474,000

Cassio over time, 1880–2025

Boys
02.557.51018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Cassio: meaning, origin, and history

Form of Cassius

Deeper origin not confirmed in the cited records

What Cassio means

Cassio is a form of Cassius.

Meaning behind the documented name family

The name developed through Cassio → Cassius. The family’s proposed meaning is “empty, vain”, recorded in the naming reference for Cassius.

Origin, language, and formation

Cassio is used in Italian.

Related names and everyday forms

Related names include Cassius.

American usage and historical context

In the United States, 16 boys were recorded with the name Cassio between 2024 and 2025. Its highest annual count was 9 in 2024; its best national rank was #8,429 in 2024.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Cassio?

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

Among all babies, 2025
1 in 474,000
7 of 3,315,165 births
Among boys only
1 in 244,000
<0.01% of boys
Rank, 2025
#9,875
of 13,926 boys’ names in use
Coin-flip room size
328,272 kids
Even odds of a second one

Where Cassio 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 100Under 1%
School of 500Under 1%

Put another way: gather 328,272 children born in 2025 and it's an even bet that one of them is another Cassio. In a class of 30 the chance is Under 1%.

When Cassios were born

Half of everyone ever recorded as Cassio was born before 2024 — so the typical Cassio is around 1 today.

Median birth year
2024
About 1 years old
Biggest decade
2020s
100.0% of all use
Born in the last 25 years
100.0%
A modern name
Recorded since 1950
16
People you could plausibly meet
Choose a decade

2020s — 100.0% of all recorded uses (16).

Is Cassio 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
−1,446
Places dropped
Rank vs 5 years ago
New entry
Not ranked then
Rank vs 10 years ago
—
Not ranked then
Births vs 10 years ago
—
Not published both years
Share of its own peak
77.8%
Peak was 2024 (9)
Years since peak
1
Years
Year-to-year steadiness
Not enough data
Too few years
Best rank ever
#8,429
2024

Spellings of Cassio

Cassio is not the most common spelling — Cassius is, with 38.7% against Cassio's 0.06%.

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.

Cassio around the world

Where Cassio 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.

  • France
    2004–2025
    #6,708
    in 2025

Popularity data from Institut national de la statistique et des études économiques. INSEE data under Licence Ouverte / Etalab 2.0.

Cassio by the numbers

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

As a boy's name

Rank in 2025
#9,875
Trend vs 5 yrs ago
New entry
Best rank ever
#8,429
2024
Peak year
2024
9 that year
First recorded
2024
Last recorded
2025
All-time count
16
Count in 2025
7

Names similar to Cassio

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

CasioCasherCaspienCasianoCassienCaspinCastynCaseinCasinoCasianCassinCashonCassenCasaiCasdenCascadeCashtinCasieCashlinCaspenCasselCashenCashisCasius

Sibling names for Cassio

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 Cassio

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