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.
- #8,690 of 45,481
- all-time among boys
- 426
- born since 1911
- 1930s
- peak 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.
- #8,690 of 45,481 all-time among boys
- 426 born since 1911
- 1930s peak decade
Data updated Aug 2026
The verdict
According to the U.S. Social Security Administration, Lennart ranks #8,690 of 45,481 boys' names by all-time recorded births (highest first). 426 born since 1911, peaking in the 1930s.
- #8,690 of 45,481
- all-time among boys
- 426
- born since 1911
- 1930s
- peak decade
Lennart's 426 recorded births place it above 80.88% of the 45,481 boys names in the full SSA archive.
The state file records this name in 3 jurisdictions, led by Illinois.
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 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
1930s is the heaviest window (102 births, 24% of the file).
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% |
24 of 426 births nationwide. Compared to a flat distribution across 3 reporting states.
Frequently Asked Questions
How popular is the name Lennart? ▼
Where does Lennart sit in the SSA name archive? ▼
When was Lennart most popular? ▼
Where is Lennart most popular? ▼
How long has the name Lennart been used? ▼
What names are similar to Lennart? ▼
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
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
Compare Lennart side by side: Lennart vs Lennox Lennart vs Lenard Lennart vs Lenny
Related Names
Names with a similar number of total births
Nationwide names with similar peak year or record span
Two nationwide peer axes for Lennart: closest SSA peak year, and closest first→latest record span. Distinct from the spelling and current-rank neighborhoods above.
Similar peak year (~1916)
Similar record span (~110 yrs)
Peak year is the single SSA year with the most births for that name; record span is first-to-latest year in the national files, not a recommendation or shared origin claim.
Data Sources
Data as of August 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).
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 August 2026.