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Kajsa

#16,035 in 2025Girls' name

Possibly Hecate or each of the two, through Karin

Kajsa has been given to 406 babies in the U.S. since 1970. In 2025 it ranked #16,035 of 17,293 girls’ names in use. Its peak year was 2010, with 18 recorded.

Babies named Kajsa, 2025

1 in 663,000

Kajsa over time, 1880–2025

Girls
0510152018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Kajsa: meaning, origin, and history

Possibly Hecate or each of the two, through Karin

Deeper origin not confirmed in the cited records

What Kajsa means

Kajsa belongs to the name family reached through Kajsa → Karin → Katarina → Αἰκατερίνη. Its meaning is “Hecate or each of the two”.

Origin, language, and formation

Kajsa is used in Swedish.

Related names and everyday forms

Related names include Karin, Katarina and Αἰκατερίνη.

Pronunciation and spelling

In Swedish, Kajsa is pronounced [²ka͜ɪsa].

American usage and historical context

In the United States, 406 girls were recorded with the name Kajsa between 1970 and 2025. Its highest annual count was 18 in 2010; its best national rank was #6,540 in 1981.

Over 5 years its rank fell, from #14,237 in 2020 to #16,035 in 2025. Over 10 years its rank rose, from #17,747 in 2015 to #16,035 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 Kajsa?

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

Among all babies, 2025
1 in 663,000
5 of 3,315,165 births
Among girls only
1 in 321,000
<0.01% of girls
Rank, 2025
#16,035
of 17,293 girls’ names in use
Coin-flip room size
459,581 kids
Even odds of a second one

Where Kajsa sits on the popularity scale

Rarest published (5 a year)#1 — Olivia (13,544)

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 459,581 children born in 2025 and it's an even bet that one of them is another Kajsa. In a class of 30 the chance is Under 1%.

When Kajsas were born

Half of everyone ever recorded as Kajsa was born before 2002 — so the typical Kajsa is around 23 today.

Median birth year
2002
About 23 years old
Biggest decade
2000s
29.3% of all use
Born in the last 25 years
55.7%
A modern name
Recorded since 1950
406
People you could plausibly meet
Choose a decade

2000s — 29.3% of all recorded uses (119).

Is Kajsa 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
−5,377
Places dropped
Rank vs 5 years ago
−1,798
Places dropped
Rank vs 10 years ago
+1,712
Places climbed
Births vs 10 years ago
1.00×
More babies than then
Share of its own peak
27.8%
Peak was 2010 (18)
Years since peak
15
Years
Year-to-year steadiness
Volatile
41.9% average annual change
Best rank ever
#6,540
1981

Spellings of Kajsa

Kajsa is not the most common spelling — Kayla is, with 49.1% against Kajsa'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.

Kajsa around the world

Where Kajsa 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.

  • Norway
    1880–2025
    #259
    in 2025
  • Canada
    2007–2007
    #2,743
    in 2007

Popularity data from Statistics Norway and Statistics Canada. SSB data under CC BY 4.0. StatCan data under Statistics Canada Open Licence.

Kajsa by the numbers

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

As a girl's name

Rank in 2025
#16,035
Trend vs 5 yrs ago
Down 1,798
Best rank ever
#6,540
1981
Peak year
2010
18 that year
First recorded
1970
Last recorded
2025
All-time count
406
Count in 2025
5

Names similar to Kajsa

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

KajaKajalKajahKajolKajuanaKajiaKajunAjsaKajiraTajsaKajsiab

Sibling names for Kajsa

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 Kajsa

Top names of 2010, Kajsa's peak yearThe 2010s in fullOther names that peaked in 1981Girls' names starting with KUncommon Swedish Girl Names