Lenni

given name · Latin script

Recorded as a male name· opposite-gender records fall within measured source noise

/ənni/(machine-generated) pronunciation, model-generated

Lenni is a given name written in the Latin script, with more bearers in Finland than in any other country. Recorded meaning: Vernacular form of Swedish Lennart or Leonard.

rarermore common
  • FIFinland1 in 1.1K(measured from records)
  • DKDenmark1 in 61K
  • SESweden1 in 133K

carrying the name, as counted by each country's national register. One hue, darker where it is more common; hover a country for its figure.

Finland (measured from records)

4,890 people

Sources
49 (measured from records)

Highest-authority source

1 in 1.1K (inferred from the name graph)

Finland

measured from records inferred from the name graph

Meaning & origin(measured from records)

Vernacular form of Swedish Lennart or Leonard.

Sources 3

Attested across 16 languages in the etymology graph.

Often considered alongside

Names that people choosing a name often weigh against Lenni, most often first. They share a style rather than an origin.

From the names suggested together in public name-advice forums, in English. A list of what people consider, not a measure of how common any name is.

Where in the world(measured from records)

Lenni counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.

Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.

Where Lenni is recorded, by country
CountryMost common spellingSources
FI Finland4,8901 in 1.1K5.3KLenni4
US United States3411 in 975K248Lenni49
DK Denmark971 in 61K81——
SE Sweden771 in 133K77—1
BR Brazil501 in 4.2M50Lenni21
CR Costa Rica61 in 850K6—2
LV Latvia21 in 941K2——

4,890 people counted by DVV — Etunimitilasto (Finnish given names register). Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.

Registers cited: DVV — Etunimitilasto (Finnish given names register); DVV — Nimipalvelu (Finnish name service, per-name lookup); Census Bureau — First Name Frequency 2020 by sex; IBGE — names by decade (Kaggle mirror); Danmarks Statistik — Hvor mange hedder...? (living-population name counts); Skatteverket — Sök hur många som har ett visst namn (living population); TSE — electoral roll (padrón) names; PMLP — Personu vārdi (given names in population register). Figures without a register are Mondonomo estimates; see Methodology.

Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).

Other names spelled this way(inferred from the name graph)

Lenni is also recorded as another name, grouped separately because the records behind them do not connect to the one described above.

  • French given name3 spellings in the group

    Most recorded in France, Finland, United States

    Also written Lénni

42 further groups record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Other recorded senses(measured from records)

Lenni is also recorded in 2 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.

  • In Hungarian, to be; to become

    as a wordEtymological Dictionary of Hungarian

  • In Hungarian, infinitive of van

    as a wordkaikki.org Wiktionary extract (IPA + transliterations)

Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.

Notable people with this name(measured from records)

192019401960198020002020Lenni Lainesalo, b. 1929Lenni Brenner, b. 1937Lenni Jabour, b. 1970Lenni-Kalle Taipale, b. 1978Marius Bøe, b. 1981Emil Kihlström, b. 1991Lenni Kim, b. 2001Lenni Hämäläinen, b. 2002Lenni Hämeenaho, b. 2004Lenni Koschuh, b. 2004

The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).

How to address them(machine-generated)

InformalHalo Lenni,Hi Lenni, (English)

A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.

Evidence(measured from records)

Attested in 37 sources across 22 countries.

Official registers attesting Lenni
CountryRegisterYearCountRank
FI FinlandDVV — Nimipalvelu (Finnish name service, per-name lookup)—5.3K#296
FI FinlandDVV — Etunimitilasto (Finnish given names register)—4.9K—
US United StatesCensus Bureau — First Name Frequency 2020 by sex2020248#27,021
US United StatesCensus Bureau — First Name Frequency 2020 by sex202093#27,021
DK DenmarkDanmarks Statistik — Hvor mange hedder...? (living-population name counts)—81#1,668
SE SwedenSkatteverket — Sök hur många som har ett visst namn (living population)—77#10,148
FI FinlandDVV — Nimipalvelu (Finnish name service, per-name lookup)—74#3,688
US United StatesSSA — National Baby Names (1880–present)202352—
BR BrazilIBGE — names by decade (Kaggle mirror)202250—
US United StatesSSA — National Baby Names (1880–present)202546—
US United StatesSSA — National Baby Names (1880–present)202445—
SE SwedenSCB — Namnstatistik (to 2023)201845—

Reference works 2

  • Wikipedia given-name tokens
  • Wikidata name items (native-script + romanized given/family names)

These works list the name; their figures are licensed and are not reproduced here.

Register rows as of the 2026-10-09 data build.

Frequently asked questions

What are other forms of the name Lenni?
In the etymology graph, Leonardo, Leonard and Lenny are forms of the same name in other languages.
How do you pronounce Lenni?
A machine transcription gives /ənni/ (IPA) for Indonesian.
Is Lenni a male or female name?
Lenni is a male name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
What does the name Lenni mean, and where does it come from?
Vernacular form of Swedish Lennart or Leonard. Recorded by Wiktionary and Etymological Dictionary of Hungarian and 1 other source.
In which country does Lenni have the most bearers?
In Finland, the national register counted about 4.9 thousand people named Lenni, more than in any other country we hold, where it is most often spelled lenni.
Where is Lenni most common?
Lenni is densest in Finland, where the national register counts about 1 in 1.1 thousand people carrying it.
How common is the name Lenni?
In Finland, the national register counted 4,890 people named Lenni, about 1 in 1.1 thousand residents.

What do you want to know about Lenni?

Nobody replies to these one by one, but what readers ask decides what these pages answer next.

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Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/lenni

The payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.

About this data

measured from records inferred from the name graph machine-generated

These figures come from the data snapshot of and will change as it is rebuilt.

Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.

Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.

Cite this page Mondonomo, “Lenni”. Data snapshot 2026-10-10.

See how Lenni parses inside a full name →