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Lenni

#3,365 in 2025Girls' name

Diminutive of Lennart

Lenni has been given to 357 babies in the U.S. since 1966. In 2025 it ranked #3,365 of 17,293 girls’ names in use. Its peak year was 2023, with 52 recorded.

Babies named Lenni, 2025

1 in 72,100

Lenni over time, 1880–2025

GirlsBoys
020406018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Lenni: meaning, origin, and history

Diminutive of Lennart

Deeper origin not confirmed in the cited records

What Lenni means

Lenni is a diminutive of Lennart.

Origin, language, and formation

Lenni is used in Finnish.

Related names and everyday forms

Related names include Lennart.

Pronunciation and spelling

In Finnish, Lenni is pronounced /ˈlenːi/.

American usage and historical context

In the United States, 341 girls were recorded with the name Lenni between 1966 and 2025. Its highest annual count was 52 in 2023; its best national rank was #3,162 in 2023.

Over 5 years its rank rose, from #4,496 in 2020 to #3,365 in 2025. Over 10 years its rank rose, from #12,482 in 2015 to #3,365 in 2025.

In the United States, 16 boys were recorded with the name Lenni between 2018 and 2024. Its highest annual count was 6 in 2024; its best national rank was #11,785 in 2024.

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 Lenni?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 72,100
46 of 3,315,165 births
Among girls only
1 in 34,900
<0.01% of girls
Rank, 2025
#3,365
of 17,293 girls’ names in use
Coin-flip room size
49,955 kids
Even odds of a second one

Where Lenni sits on the popularity scale

Rarest published (5 a year)#1 — Olivia (13,544)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 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 49,955 children born in 2025 and it's an even bet that one of them is another Lenni. In a class of 30 the chance is Under 1%.

When Lennis were born

Half of everyone ever recorded as Lenni was born before 2022 — so the typical Lenni is around 3 today.

Median birth year
2022
About 3 years old
Biggest decade
2020s
68.6% of all use
Born in the last 25 years
96.8%
A modern name
Recorded since 1950
341
People you could plausibly meet
Choose a decade

2020s — 68.6% of all recorded uses (234).

Is Lenni 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
+121
Places climbed
Rank vs 5 years ago
+1,131
Places climbed
Rank vs 10 years ago
+9,117
Places climbed
Births vs 10 years ago
5.75×
More babies than then
Share of its own peak
88.5%
Peak was 2023 (52)
Years since peak
2
Years
Year-to-year steadiness
Volatile
36.7% average annual change
Best rank ever
#3,162
2023

Spellings of Lenni

Lenni is not the most common spelling — Lynn is, with 13.6% against Lenni's 0.03%.

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 Lenni is used

Across 1910–2025, Lenni was most concentrated in Florida — about 1 in — girls, against 1 in 985,300 across all states with data. It was least common in Texas (1 in —).

00 per 100,000

Most concentrated

  1. 1Florida1 in —
  2. 2Michigan1 in —
  3. 3Minnesota1 in —
  4. 4Pennsylvania1 in —
  5. 5Texas1 in —

Shading is the share of that state's recorded girls 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. Lenni has too little recent state data to map, so this covers all years from 1910.

Lenni around the world

Where Lenni 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
    2002–2025
    #4,201
    in 2025
  • Canada
    2018–2024
    #2,256
    in 2024
  • South Australia
    2009–2013
    #818
    in 2013

Popularity data from Office for National Statistics, Statistics Canada and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.

Lenni by the numbers

The raw record for each sex the name is used for.

As a girl's name

Rank in 2025
#3,365
Trend vs 5 yrs ago
Up 1,131
Best rank ever
#3,162
2023
Peak year
2023
52 that year
First recorded
1966
Last recorded
2025
All-time count
341
Count in 2025
46

As a boy's name

Rank in 2025
Unranked
Trend vs 5 yrs ago
—
Best rank ever
#11,785
2024
Peak year
2024
6 that year
First recorded
2018
Last recorded
2024
All-time count
16
Count in 2025
Under 5

Names similar to Lenni

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

LenyxLenoxLennyLeniaLenixLenayaLennixLennyxKenniLenorYanniLeneeLennanLennynSonniLeniyahLeneaLenayLenahLenyaLenellJianniLenaeWinni

Sibling names for Lenni

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 Lenni

Top names of 2023, Lenni's peak yearThe 2020s in fullOther names that peaked in 2023Girls' names starting with LFinnish Boy Names