Koide

surname · Latin script

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

Koide is a surname written in the Latin script, with more bearers in Brazil than in any other country.

rarermore common
  • USUnited States1 in 1.6M(measured from records)
  • BRBrazil1 in 430K
  • CHSwitzerland1 in 1.1M

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.

Brazil (measured from records)

492 people

Sources
116 (measured from records)

Highest-authority source

1 in 430K (inferred from the name graph)

Brazil

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin

No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.

Attested across 2 languages in the etymology graph.

Where in the world(measured from records)

Koide 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 Koide is recorded, by country
CountryMost common spellingSources
BR Brazil4921 in 430K492——
US United States2131 in 1.6M225Koide116
CH Switzerland81 in 1.1M8—1
PL Poland71 in 5.5M4——
AU Australia———Koide14
TN Tunisia———Koide1

492 people counted by IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname). 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 2020; IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); BFS — Familiennamen der Wohnbevölkerung (surnames); dane.gov.pl — PESEL living persons (surnames). 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)

Koide is also recorded as 2 other names, grouped separately because the records behind them do not connect to the one described above.

  • a separate name2 spellings in the group

    Also written Koidé

  • French surname3 spellings in the group

    Most recorded in France, United States

    Also written Koïdé, Koidé

31 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)

Koide is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.

  • In Estonian, genitive plural of koi

    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)

1850190019502000Goichirō Narusawa, b. 1881Narashige Koide, b. 1887Yoshio Koide, b. 1939Hiroaki Koide, b. 1949Mina Koide, b. 1960Maho Koide, b. 1982Yūsuke Koide, b. 1984Mikan, b. 1984Saori, b. 1988

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).

Evidence(measured from records)

Attested in 10 sources across 5 countries.

Official registers attesting Koide
CountryRegisterYearCountRank
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—492#17,354
US United StatesCensus Bureau — Surname Frequency 20202020225#88,580
US United StatesCensus Bureau — Surname Frequency 20102010213#87,335
US United StatesCensus Bureau — Surname Frequency 20002000211#83,004
CH SwitzerlandBFS — Familiennamen der Wohnbevölkerung (surnames)20248#72,019
PL Polanddane.gov.pl — PESEL living persons (surnames)20264—
PL Polanddane.gov.pl — PESEL living persons (names)—4#228,094
PL Polanddane.gov.pl — PESEL living persons (surnames)20263—
PL Polanddane.gov.pl — PESEL living persons (names)—3#268,172
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

Reference works 1

  • Wikipedia surname tokens

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

In which country does Koide have the most bearers?
In Brazil, the national register counted about 492 people named Koide, more than in any other country we hold.
Where is Koide most common?
Koide is densest in Brazil, where the national register counts about 1 in 430 thousand people carrying it.
How common is the name Koide?
In Brazil, the national register counted 492 people named Koide, about 1 in 430 thousand residents.

What do you want to know about Koide?

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

Please leave out anyone's personal details (see Privacy).

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

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, “Koide”. Data snapshot 2026-10-10.

See how Koide parses inside a full name →