Baby Names US
girls' name ★ peaked 2023

Lenni

Gender Girl · 4% boys Rank 2025 #3,366 Trend ↑ Rising 112%
Rank 2025
#3,366
among girls · ↑120 vs 2024
Babies in 2025
46
named Lenni · -10% vs 2024
How common
1 in 34,941
girls born in 2025
Peak year
2023
52 babies
All-time total
357
#14,851 all-time among girls
First recorded
1966
in Social Security records

Lenni popularity over time

357 babies have been named Lenni since 1966, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure
Births per 1,000 babies of that sex, comparable across eras
0.010.020.030.0418801900192019401960198020002020GirlsBoys
GirlsBoys

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade Girls Boys Total Per year Change Best rank
1880s – – – – – –
1890s – – – – – –
1900s – – – – – –
1910s – – – – – –
1920s – – – – – –
1930s – – – – – –
1940s – – – – – –
1950s – – – – – –
1960s 5 – 5 1 – #7,145
1970s 6 – 6 1 +20% #9,104
1980s – – – – – –
1990s – – – – – –
2000s – – – – – –
2010s 96 5 101 10 – #5,244
2020s (to 2025) 234 11 245 41 +304% #3,162

Where Lenni is heading

A five-year projection from the recent trend in births per 1,000 girls (damped so it flattens over time), converted to babies at today's birth totals. The implied rank places that projection in the 2025 field. A projection, not a promise: real trends bend.

Year Projected babies Per 1,000 girls Implied rank
2026 53 0.03 outside top 500
2027 60 0.04 outside top 500
2028 66 0.04 outside top 500
2029 72 0.04 outside top 500
2030 78 0.05 outside top 500

The story of Lenni

Lenni is rare for girls in the United States, ranked #3,366 in 2025 with 46 babies given the name. It is currently rising compared with a decade ago.

Since 1966, 357 American babies have been named Lenni. Its peak came in 2023, when 52 newborns received the name, the signature sound of the 2020s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Lenni stood among all girls' names in any year, or use the compare tool to plot it against other names.

How old are people named Lenni?

The median living Lenni is about 4 years old; half are between 1 and 6. An estimated 400 people named Lenni are alive in the United States today.

median 4 020406080100

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Lenni year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year Girls Girls rank Boys Boys rank
2025 46 #3,366 – –
2024 45 #3,486 6 #11,790
2023 52 #3,162 – –
2022 29 #4,737 – –
2021 32 #4,372 – –
2020 30 #4,498 5 #13,276
2019 25 #5,244 – –
2018 13 #8,405 5 #13,359
2017 20 #6,190 – –
2016 15 #7,821 – –
2015 8 #12,487 – –
2014 9 #11,526 – –
2013 6 #15,729 – –
2012 – – – –
2011 – – – –
2010 – – – –
2009 – – – –
2008 – – – –
2007 – – – –
2006 – – – –
2005 – – – –
2004 – – – –
2003 – – – –
2002 – – – –
2001 – – – –
2000 – – – –
1995 – – – –
1990 – – – –
1985 – – – –
1980 – – – –
1975 – – – –
1970 – – – –
1965 – – – –
1960 – – – –
1955 – – – –
1950 – – – –
1945 – – – –
1940 – – – –
1935 – – – –
1930 – – – –
1925 – – – –
1920 – – – –
1915 – – – –
1910 – – – –
1905 – – – –
1900 – – – –
1895 – – – –
1890 – – – –
1885 – – – –
1880 – – – –

Frequently asked questions

Quick answers about Lenni, drawn from the same Social Security data as the charts above.

How old is the average Lenni?

The median living Lenni is about 4 years old. Half of all living Lennis are between 1 and 6 years old.

How many people named Lenni are alive today?

An estimated 400 people named Lenni are alive in the United States, based on 357 recorded births and Social Security life tables.

How popular is the name Lenni in 2025?

Lenni ranked #3,366 among girls' names in the United States in 2025, with 46 babies given the name, according to Social Security Administration data.

How many people are named Lenni?

357 babies have been named Lenni in the United States since 1966, based on Social Security card applications.

When was the name Lenni most popular?

Lenni peaked in 2023, when 52 newborns received the name.

Is Lenni a boy or girl name?

Lenni is overwhelmingly a girl's name: 96% of babies with the name.

Is the name Lenni rising or falling?

Lenni is on the rise, noticeably more popular now than a decade ago.

Will Lenni become more popular?

Lenni is trending upward. If the recent trend holds, we project roughly 78 girls named Lenni in 2030, which would rank outside the top 500. Forecasts assume the current trend continues and become less certain further out.

Names like Lenni

Names that sound and feel close to Lenni: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Lenni with similar names → More names starting with L →