Hayashi

surname · Latin script

Meaning, in Japanese: ‘forest’; variously written, found mostly in western Japan and the Ryukyu Islands. Listed in the Shinsen shojiroku. One family produced several noted scholars during the Tokugawa era (1600-1867)

Recorded for both men and women· direction only, no split published

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

Hayashi is a surname written in the Latin script, with more bearers in the United States than in any other country.

rarermore common
  • USUnited States1 in 111K(measured from records)
  • BRBrazil1 in 76K
  • FIFinland1 in 90K

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.

United States (measured from records)

2,992 people, 2010

Sources
251 (measured from records)

Highest-authority source

1 in 76K (inferred from the name graph)

Brazil

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin(measured from records)

‘forest’; variously written, found mostly in western Japan and the Ryukyu Islands. Listed in the Shinsen shojiroku. One family produced several noted scholars during the Tokugawa era (1600-1867).

Sources 1

  • Dictionary of American Family Names

Attested across 2 languages in the etymology graph.

How Hayashi is read(measured from records)

Hayashi is one spelling over 3 language communities, and the dictionaries record it differently in 2 of them. Each row is what a source recorded for that language, beside the share of this name’s records the language holds. No single row is the name’s meaning.

  • Japanese59%

    ‘forest’; variously written, found mostly in western Japan and the Ryukyu Islands. Listed in the Shinsen shojiroku. One family produced several noted scholars during the Tokugawa era (1600-1867).

    as a nameDictionary of American Family Names

  • English24%

    Teru, Japanese diplomat

    as a namePronouncing Dictionary of Proper Names

  • Portuguese7.4%

    No dictionary in our sources glosses Hayashi in Portuguese.

The share is ours — how much of this name’s records each language holds. The sense beside it is the source’s, quoted and credited, including where it names a gender. We do not publish a gender of our own per language: our records carry one figure for the spelling as a whole.

Where in the world(measured from records)

Hayashi 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 Hayashi is recorded, by country
CountryMost common spellingSources
US United States2,9921 in 111K3.1KHayashi251
BR Brazil2,7951 in 76K2.8K—3
FI Finland621 in 90K62—2
AR Argentina611 in 746K61—1
ES Spain521 in 962K52—7
SE Sweden341 in 300K34—5
UY Uruguay181 in 188K18——

2,992 people counted by Census Bureau — Surname Frequency 2010, 2010. 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: Census Bureau — Surname Frequency 2010; Census Bureau — Surname Frequency 2000; IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); DVV — Nimipalvelu (Finnish name service, per-name lookup); RENAPER — Apellidos (person counts, national); INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); Skatteverket — Sök hur många som har ett visst namn (living population); INE Uruguay — Apellidos más frecuentes 1902–2024 (Tableau Public). 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).

Notable people with this name(measured from records)

1850190019502000Senjuro Hayashi, b. 1876Yoshihide Hayashi, b. 1891Chushiro Hayashi, b. 1920Chikage Ōgi, b. 1933Eitetsu Hayashi, b. 1952Hiroko Hayashi, b. 1959Masahiko Hayashi, b. 1959Yoshimasa Hayashi, b. 1961Yoshiki, b. 1965Yuki Hayashi, b. 1980

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)

FormalHayashi様Dear Hayashi-san, (English)
Informalこんにちは、HayashiさんHi Hayashi, (English)

Evidence(measured from records)

Attested in 26 sources across 16 countries.

Official registers attesting Hayashi
CountryRegisterYearCountRank
US United StatesCensus Bureau — Surname Frequency 200020003.1K#9,550
US United StatesCensus Bureau — Surname Frequency 201020103K#10,683
US United StatesCensus Bureau — Surname Frequency 202020202.9K#10,684
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—2.8K#3,651
FI FinlandDVV — Nimipalvelu (Finnish name service, per-name lookup)—62#18,793
AR ArgentinaRENAPER — Apellidos (person counts, national)—61—
ES SpainINE — Apellidos más frecuentes (Padrón Municipal)—52#43,442
ES SpainINE — Padrón per-token widgets (current living counts, given + apellidos)—52#43,157
SE SwedenSkatteverket — Sök hur många som har ett visst namn (living population)—34#17,259
UY UruguayINE Uruguay — Apellidos más frecuentes 1902–2024 (Tableau Public)—18—
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

Reference works 4

  • Dictionary of American Family Names
  • Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
  • Wikipedia surname 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 does the name Hayashi mean, and where does it come from?
‘forest’; variously written, found mostly in western Japan and the Ryukyu Islands. Listed in the Shinsen shojiroku. One family produced several noted scholars during the Tokugawa era (1600-1867). Recorded by Dictionary of American Family Names.
How do you pronounce Hayashi?
A machine transcription gives /hɑˈjɑʃi/ (IPA) for Japanese.
In which country does Hayashi have the most bearers?
In the United States, the national register counted about 3.0 thousand people named Hayashi, more than in any other country we hold, where it is most often spelled hayashi.
Where is Hayashi most common?
Measured as a share of residents rather than as a count, Hayashi is densest in Brazil — about 1 in 76 thousand people — even though United States holds more of our records for it.
How common is the name Hayashi?
In the United States, the national register counted 2,992 people named Hayashi in 2010, about 1 in 111 thousand residents.

What do you want to know about Hayashi?

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

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, “Hayashi”. Data snapshot 2026-10-10.

See how Hayashi parses inside a full name →