Kaarlo

Boys' name

Free man, through Kaarle

Kaarlo has been given to 5 babies in the U.S. since 1919. 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 1919, with 5 recorded.

Babies named Kaarlo, 1919

1 in 422,000

Kaarlo over time, 1880–2025

Boys

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Kaarlo: meaning, origin, and history

Free man, through Kaarle

Deeper origin not confirmed in the cited records

What Kaarlo means

Kaarlo belongs to the name family reached through Kaarlo → Kaarle. Its meaning is “free man”.

Origin, language, and formation

Kaarlo is used in Finnish.

Related names and everyday forms

Related names include Kaarle.

Pronunciation and spelling

In Finnish, Kaarlo is pronounced /ˈkɑːrlo/.

American usage and historical context

In the United States, 5 boys were recorded with the name Kaarlo between 1919 and 1919. Its highest annual count was 5 in 1919; its best national rank was #4,485 in 1919.

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 Kaarlo?

Kaarlo had fewer than 5 recorded uses in 2025, so these figures use 1919, the last year it was published.

Among all babies, 1919: 1 in 422,000; 5 of 2,110,182 births
Among boys only: 1 in 196,000; <0.01% of boys
Rank, 1919: Unranked; Fewer than 5 uses
Coin-flip room size: 292,534 kids; Even odds of a second one

Where Kaarlo 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 1919 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 292,534 children born in 1919 and it's an even bet that one of them is another Kaarlo. In a class of 30 the chance is Under 1%.

When Kaarlos were born

Half of everyone ever recorded as Kaarlo was born before 1919 — so the typical Kaarlo is around 106 today.

Median birth year: 1919; About 106 years old
Biggest decade: 1910s; 100.0% of all use
Born in the last 25 years: 100.0%; A modern name
Recorded since 1950: 0; People you could plausibly meet

Choose a decade

1910s — 100.0% of all recorded uses (5).

Is Kaarlo 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 1919 (5)
Years since peak: 106; Years
Year-to-year steadiness: Not enough data; Too few years
Best rank ever: #4,485; 1919

Spellings of Kaarlo

Kaarlo is not the most common spelling — Karl is, with 63.2% against Kaarlo's <0.01%.

Karl63.2%100,836
Arlo15.2%24,245
Carlo10.0%15,920
Kairo7.0%11,224
Marlo2.3%3,680
Karlos1.3%2,018
Karlo0.66%1,061
Kailo0.37%583

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.

Kaarlo 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: #4,485; 1919
Peak year: 1919; 5 that year
First recorded: 1919
Last recorded: 1919
All-time count: 5
Count in 2025: Under 5

Names similar to Kaarlo

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

Kaanan Dcarlo Kaaden Kaashif Kaamil Damarlo Kaare Darlo Jenkarlo Kaash Tarlo Yankarlo Thurlo Juancarlo Jankarlo Iancarlo Harlo Geancarlo Yancarlo Joncarlo Kaan Jiancarlo Demarlo Giankarlo

Sibling names for Kaarlo

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

For a sister

Lovie Hortense Lue Theda Rubye Winnifred Johnie Norine

For a brother

Casimir Edd Ora Mahlon Verne Haywood Buck Wilber

Explore around Kaarlo

Top names of 1919, Kaarlo's peak year The 1910s in full Other names that peaked in 1919 Boys' names starting with K Uncommon Finnish Boy Names