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Kacper

#7,408 in 2025Boys' name

Form of Jasper

Kacper has been given to 1,102 babies in the U.S. since 1994. In 2025 it ranked #7,408 of 13,926 boys’ names in use. Its peak year was 2007, with 88 recorded.

Babies named Kacper, 2025

1 in 301,000

Kacper over time, 1880–2025

Boys
025507510018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Kacper: meaning, origin, and history

Form of Jasper

Deeper origin not confirmed in the cited records

What Kacper means

Kacper is a form of Jasper.

Meaning behind the documented name family

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

Origin, language, and formation

Kacper is used in Polish.

Related names and everyday forms

Related names include Jasper and Casper.

Pronunciation and spelling

In Polish, Kacper is pronounced /ˈkat͡s.pɛr/.

American usage and historical context

In the United States, 1,102 boys were recorded with the name Kacper between 1994 and 2025. Its highest annual count was 88 in 2007; its best national rank was #1,651 in 2006.

Over 5 years its rank fell, from #7,245 in 2020 to #7,408 in 2025. Over 10 years its rank fell, from #3,632 in 2015 to #7,408 in 2025.

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 Kacper?

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

Among all babies, 2025
1 in 301,000
11 of 3,315,165 births
Among boys only
1 in 155,000
<0.01% of boys
Rank, 2025
#7,408
of 13,926 boys’ names in use
Coin-flip room size
208,901 kids
Even odds of a second one

Where Kacper 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 208,901 children born in 2025 and it's an even bet that one of them is another Kacper. In a class of 30 the chance is Under 1%.

When Kacpers were born

Half of everyone ever recorded as Kacper was born before 2008 — so the typical Kacper is around 17 today.

Median birth year
2008
About 17 years old
Biggest decade
2000s
51.1% of all use
Born in the last 25 years
91.5%
A modern name
Recorded since 1950
1,102
People you could plausibly meet
Choose a decade

2000s — 51.1% of all recorded uses (563).

Is Kacper 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
−1,862
Places dropped
Rank vs 5 years ago
−163
Places dropped
Rank vs 10 years ago
−3,776
Places dropped
Births vs 10 years ago
0.37×
Fewer babies than then
Share of its own peak
12.5%
Peak was 2007 (88)
Years since peak
18
Years
Year-to-year steadiness
Volatile
28.0% average annual change
Best rank ever
#1,651
2006

Spellings of Kacper

Kacper is not the most common spelling — Jasper is, with 48.5% against Kacper's 0.86%.

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 Kacper is used

Across 1910–2025, Kacper was most concentrated in Illinois — about 1 in 16,667 boys, against 1 in 34,193 across all states with data. It was least common in Connecticut (1 in 100,000).

16 per 100,000

Most concentrated

  1. 1Illinois1 in 16,667
  2. 2New Jersey1 in 50,000
  3. 3New York1 in 50,000
  4. 4Connecticut1 in 100,000

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. Kacper has too little recent state data to map, so this covers all years from 1910.

Kacper around the world

Where Kacper 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
    2001–2025
    #782
    in 2025
  • Scotland
    2007–2024
    #619
    in 2024
  • Northern Ireland
    2006–2021
    #433
    in 2021
  • Ireland
    2004–2025
    #829
    in 2025
  • France
    2002–2024
    #5,806
    in 2024
  • Norway
    1880–2025
    #417
    in 2025
  • Canada
    1996–2022
    #2,959
    in 2022
  • South Australia
    1962–2005
    #643
    in 2005

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

Kacper by the numbers

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

As a boy's name

Rank in 2025
#7,408
Trend vs 5 yrs ago
Down 163
Best rank ever
#1,651
2006
Peak year
2007
88 that year
First recorded
1994
Last recorded
2025
All-time count
1,102
Count in 2025
11

Names similar to Kacper

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

KacenKasperKacyKemperKaceyTrapperKaceonKacynCopperSkipperJazperProsperRoperKooperKaceJesperGasperKaceyonChipperCasperKacheHarperKaceeKaci

Sibling names for Kacper

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 Kacper

Top names of 2007, Kacper's peak yearThe 2000s in fullOther names that peaked in 2006Boys' names starting with KPolish Boy NamesPolish Names