How Many People Are Named Lennart?
An estimated 131 people in the United States have the first name Lennart. It is almost exclusively a male name. The average bearer is 66 years old, and Lennart peaked in popularity in 1916 with 18 births that year.
Below you will find a full statistical profile of Lennart as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Lennart paired with any surname.
Key Insights
- With an average bearer age of 66, Lennart is a vintage name most associated with earlier generations. Most living bearers were born before 1970.
Estimated Living Americans
131
About 1 in 2,616,445 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
66
years old
Peak Year
1916
18 births
Total Registered
426
since 1880
Gender Distribution for Lennart
Lennart is almost exclusively a male name. Out of 426 total births registered, 100.0% were male.
Lennart as a male name
Ranked #13,290 in 2021
5 male births in 2021
Peak: 1916 (18 births)
Lennart: Popularity Over Time
SSA records for Lennart span from the 1910s to the 2020s, covering 10 decades of naming data. The most popular decade for this name was the 1930s, when 102 babies were registered. Lennart has declined significantly from its peak in the 1930s. Recent registrations are a fraction of what they were at the name's height.
Lennart by Decade
How has Lennart tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Lennart by State
Birth registrations for Lennart span all 3 states and territories in the SSA database. The highest counts are in Illinois, New York, Massachusetts. The lowest are in Massachusetts, New York, Illinois. On average, about 12 Lennarts were registered per state.
Lennart + Last Name Combinations
How many people share a full name with Lennart as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Lennart
Other first names starting with L with a similar number of bearers.
Lennart: Questions and Answers
How many people in the U.S. are named Lennart?
We estimate approximately 131 people named Lennart are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 2,616,445 Americans share this first name.
Is Lennart a common name?
Lennart is classified as "Very Rare" and is more popular than 68.4% of all first names in the SSA database. A total of 426 births have been registered with this name since 1880.
When was Lennart most popular?
Lennart reached peak popularity in 1916, when 18 babies were given this name. The average age of a living person named Lennart is approximately 66 years old, reflecting when the name was most commonly given.
Is Lennart a male name?
Lennart is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Lennart Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Lennart Smith, Lennart Johnson, Lennart Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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