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Lennart

Boys' name

Form of Leonard

Lennart has been given to 426 babies in the U.S. since 1911. 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 1916, with 18 recorded.

Babies named Lennart, 2021

1 in 678,000

Lennart over time, 1880–2025

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Lennart: meaning, origin, and history

Form of Leonard

Deeper origin not confirmed in the cited records

What Lennart means

Lennart is a form of Leonard.

Documented naming usage and pronunciation

Lennart is used in Swedish, Danish, Norwegian, Finnish, Estonian, Low German and Dutch.

Another recorded pronunciation is /ˈlɛ.nɑrt/ for Lennart.

Meaning behind the documented name family

The name developed through Lennart → Leonard. The family’s meaning is “lion”, recorded in English with the source elements leo.

Origin, language, and formation

Lennart is used in Danish, Estonian, Finnish, German and Swedish.

Related names and everyday forms

Related names include Leonard and Leonhard.

Pronunciation and spelling

In Finnish, Lennart is pronounced /ˈlenːɑrt/.

American usage and historical context

In the United States, 426 boys were recorded with the name Lennart between 1911 and 2021. Its highest annual count was 18 in 1916; its best national rank was #1,733 in 1916.

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 Lennart?

Lennart had fewer than 5 recorded uses in 2025, so these figures use 2021, the last year it was published.

Among all babies, 2021
1 in 678,000
5 of 3,389,958 births
Among boys only
1 in 350,000
<0.01% of boys
Rank, 2021
Unranked
Fewer than 5 uses
Coin-flip room size
469,949 kids
Even odds of a second one

Where Lennart 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 2021 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 469,949 children born in 2021 and it's an even bet that one of them is another Lennart. In a class of 30 the chance is Under 1%.

When Lennarts were born

Half of everyone ever recorded as Lennart was born before 1932 — so the typical Lennart is around 93 today.

Median birth year
1932
About 93 years old
Biggest decade
1930s
23.9% of all use
Born in the last 25 years
5.4%
Mostly a past generation
Recorded since 1950
93
People you could plausibly meet
Choose a decade

1930s — 23.9% of all recorded uses (102).

Is Lennart 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 1916 (18)
Years since peak
109
Years
Year-to-year steadiness
Shifting
23.2% average annual change
Best rank ever
#1,733
1916

Spellings of Lennart

Lennart is not the most common spelling — Leonard is, with 94.4% against Lennart's 0.14%.

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 Lennart is used

Across 1910–2025, Lennart was most concentrated in Illinois — about 1 in — boys, against 1 in 745,775 across all states with data. It was least common in New York (1 in —).

00 per 100,000

Most concentrated

  1. 1Illinois1 in —
  2. 2Massachusetts1 in —
  3. 3New York1 in —

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

Lennart around the world

Where Lennart 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
    2010–2023
    #4,992
    in 2023
  • France
    1998–1998
    #3,752
    in 1998
  • Norway
    1880–2021
    #388
    in 2021
  • South Australia
    1953–2008
    #726
    in 2008

Popularity data from Office for National Statistics, Institut national de la statistique et des études économiques, Statistics Norway and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. SSB, CBS SA data under CC BY 4.0.

Lennart 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
#1,733
1916
Peak year
1916
18 that year
First recorded
1911
Last recorded
2021
All-time count
426
Count in 2025
Under 5

Names similar to Lennart

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

LennixLenninLenwardLenoardTaggartLendellLennexLennyxLenoxxLennynLenyxLenzieLenixLenielLenellLennardLendonLentonLennellLenardoLenierLennieLenoReinhart

Sibling names for Lennart

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 Lennart

Top names of 1916, Lennart's peak yearThe 1910s in fullOther names that peaked in 1916Boys' names starting with LEstonian Boy Names