Total births
426
Boys' name · since 1911
Lennart
Since 1911, U.S. Social Security records show 426 babies named Lennart, peaking in 1916. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- 426
- total births
- 1911–2021
- years on record
- 1930s
- peak decade
- 24%
- born in that decade
Lennart is not among the current top-ranked boys names; 426 have been recorded since 1911.
Social Security Administration records show Lennart recorded 426 times among boys since 1911, though it doesn't currently rank among the most-used boys names, peaking in the 1930s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1911 to 2021.
- 426 total births
- 1911–2021 years on record
- 1930s peak decade
- 24% born in that decade
Data updated Jul 2026
The verdict
426 boys have been named Lennart since 1911, peaking in the 1930s, last recorded in 2021.
- 426
- total births
- 1911–2021
- years on record
- 1930s
- peak decade
- 24%
- born in that decade
1930s
Peak decade
24% of everyone ever named Lennart was born in this single decade.
1916
Single peak year
18 babies were named Lennart in 1916 - its busiest year on record.
Lennart's usage pattern, beyond the headline number
Divide Lennart's SSA record in two at 1937 and the more recent half accounts for 41% of all births, the earlier half the remaining 59%, a genuinely balanced usage pattern. Its calmest year was 1911, with only 5 births recorded -- set against the 1916 peak of 18, that's the full swing in one name's fortunes.
Lennart at a glance
Last recorded 2021Peak year
1916
Current rank
Unranked
Active since
1911
Lennart popularity over time
Annual U.S. births registered with the Social Security Administration · 1911–2021
- Peak year (1916)
- 18
- Annual births at peak, across 111 years of records
Lennart by decade
Total births in each ten-year window, peak vs trough at a glance
1930s was Lennart's strongest decade.
102 babies received the name during that ten-year window, about 24% of all-time use.
Lennart births by decade
Total births in each ten-year window
- 1910s
1910s
72 births
- 1920s
1920s
101 births
- 1930s
1930s
102 births
- 1940s
1940s
58 births
- 1950s
1950s
46 births
- 1960s 19
1960s
19 births
- 1970s 5
1970s
5 births
- 2000s 5
2000s
5 births
- 2010s 13
2010s
13 births
- 2020s 5
2020s
5 births
What this shows Peak: 1930s at 102 births (24% of all-time use).
Lennart by state
Where Lennart concentrates geographically, total births since 1911
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Illinois | | 24 | 5.6% |
| #2 | New York | | 6 | 1.4% |
| #3 | Massachusetts | | 5 | 1.2% |
Illinois share of Lennart's total US births 5.6%
Even split
24 of 426 births nationwide. Compared to a flat distribution across 3 reporting states.
Frequently Asked Questions
How popular is the name Lennart? ▼
426 babies have been named Lennart since 1911. It was last recorded in 2021. The peak year was 1916 with 18 births.
When was Lennart most popular? ▼
Lennart was most popular in the 1930s decade with 102 total births. The single peak year was 1916.
Where is Lennart most popular? ▼
The top states for the name Lennart are Illinois (24 births), New York (6 births), Massachusetts (5 births).
How long has the name Lennart been used? ▼
Records for Lennart go back to 1911, giving 111 years of history through 2021.
What names are similar to Lennart? ▼
Names with a similar sound or spelling include Lennox, Lenard, Lenny, Lennon, and 4 more. These share a common prefix and are also used for boys.
What to do with Lennart's data
- Lennart's decade-level peak was the 1930s (102 total births); usage has since declined to 5 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Illinois records the most Lennarts (24 births) -- see the full state breakdown if geography matters to your decision. Illinois names
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Lennart
Nearby Names Like Lennart
Names with a similar sound, spelling, or feel to Lennart
Lennox Boy
#264 14,330 births
Lenard Boy
#7772 9,997 births
Lenny Boy
#1372 8,299 births
Lennon Boy
#786 8,003 births
Len Boy
#8995 4,514 births
Compare Lennart side by side: Lennart vs Lennox Lennart vs Lenard Lennart vs Lenny
Related Names
Names with a similar number of total births
Data Sources
Data as of July 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1911–2021 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Lennart: Baby Name Since 1911 - 426 Births, Peak 1916." NameAlmanac. Accessed via https://namealmanac.com/name/lennart. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Lennart draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of July 2026.