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Cas

Boys' name

Short form of Casper

Cas has been given to 181 babies in the U.S. since 1881. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 2020, with 13 recorded.

Babies named Cas, 2024

1 in 334,000

Cas over time, 1880–2025

Boys
05101518801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Cas: meaning, origin, and history

Short form of Casper

Deeper origin not confirmed in the cited records

What Cas means

Cas is a short form of Casper.

Documented naming usage and pronunciation

Cas is used in Dutch.

Another recorded pronunciation is /ˈkɑs/ for Cas.

Meaning behind the documented name family

The name developed through Cas → Casper → Caspar → *ganǰabarah. The family’s proposed meaning is “rich”, recorded in Old Median with the source elements ɣzdk.

Related names and everyday forms

Related names include Casper.

American usage and historical context

In the United States, 181 boys were recorded with the name Cas between 1881 and 2024. Its highest annual count was 13 in 2020; its best national rank was #717 in 1881.

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 Cas?

Cas had fewer than 5 recorded uses in 2025, so these figures use 2024, the last year it was published.

Among all babies, 2024
1 in 334,000
10 of 3,342,801 births
Among boys only
1 in 172,000
<0.01% of boys
Rank, 2024
Unranked
Fewer than 5 uses
Coin-flip room size
231,706 kids
Even odds of a second one

Where Cas 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 2024 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 231,706 children born in 2024 and it's an even bet that one of them is another Cas. In a class of 30 the chance is Under 1%.

When Cass were born

Half of everyone ever recorded as Cas was born before 2014 — so the typical Cas is around 11 today.

Median birth year
2014
About 11 years old
Biggest decade
2010s
28.2% of all use
Born in the last 25 years
56.4%
A modern name
Recorded since 1950
144
People you could plausibly meet
Choose a decade

2010s — 28.2% of all recorded uses (51).

Is Cas 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
—
Not ranked then
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
0%
Peak was 2020 (13)
Years since peak
5
Years
Year-to-year steadiness
Volatile
34.7% average annual change
Best rank ever
#717
1881

Cas around the world

Where Cas 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
    2012–2020
    #4,608
    in 2020

Popularity data from Office for National Statistics. ONS data under Open Government Licence v3.0.

Cas by the numbers

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

As a boy's name

Rank in 2025
Unranked
Trend vs 5 yrs ago
—
Best rank ever
#717
1881
Peak year
2020
13 that year
First recorded
1881
Last recorded
2024
All-time count
181
Count in 2025
Under 5

Names similar to Cas

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

CastinCastenCasyCashisCaspenCasynCashusCasmirCastleCastorCasparCashtynCassCasinCashmirCasaiCashelCastonCashtenCaspinCaswellCasseyCasanovaCasmer

Sibling names for Cas

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 Cas

Top names of 2020, Cas's peak yearThe 2020s in fullOther names that peaked in 1881Boys' names starting with C