Iwasaki
surname · Latin script
Meaning: ‘stone cape’; variously written, also pronounced Iwazaki and Iwagasaki
Recorded for both men and women· direction only, no split published
Iwasaki is a surname written in the Latin script, with more bearers in the United States than in any other country.
- FIFinland1 in 242K(measured from records)
- USUnited States1 in 353K
- CHSwitzerland1 in 365K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Iwasaki itself, the figure is that spelling’s, and it is named. One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- 2 (measured from records)
- Sources
- 31 (measured from records)
- 1 in 242K (inferred from the name graph)
943 people, 2010
recorded for this name
Highest-authority source
Finland
measured from records inferred from the name graph
Spellings & scripts(measured from records)
Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
Meaning & origin(measured from records)
‘stone cape’; variously written, also pronounced Iwazaki and Iwagasaki. A common place name throughout Japan, found as a surname in western Japan and the Ryukyu Islands. One family was samurai ofTosa (now Kochi prefecture).
Sources 1
- Dictionary of American Family Names
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Iwasaki 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.
| Country | Most common spelling | Sources | |||
|---|---|---|---|---|---|
| US United States | 943 | 1 in 353K | 951 | — | 1 |
| BR Brazil | 426 | 1 in 497K | 426 | — | — |
| TH Thailand | ≈53 est. | ≈1 in 1.3M | #824,696 | Iwasaki | 31 |
| AR Argentina | 34 | 1 in 1.3M | 34 | — | — |
| CH Switzerland | 23 | 1 in 365K | 23 | — | 1 |
| FI Finland | 23 | 1 in 242K | 23 | — | — |
943 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); RENAPER — Apellidos (person counts, national); BFS — Familiennamen der Wohnbevölkerung (surnames); DVV — Nimipalvelu (Finnish name service, per-name lookup). 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)
- Iwasaki Yatarōb. 1835JPJapanese industrialist; founder of Mitsubishi (1835–1885)
- Iwasaki Yanosukeb. 1851JPJapanese banker
- Mineko Iwasakib. 1949JPJapanese Geisha
- Hiroshi Iwasakib. 1953JPJapanese voice actor
- Hiromi Iwasakib. 1958JPJapanese singer
- Pablo Lariosb. 1960MXnot in their usual nameMexican association football player (1960–2019)
- Fernando Iwasakib. 1961PEPeruvian writer and historian
- Yoshimi Iwasakib. 1961JPJapanese singer and actress
- Masanori Iwasakib. 1974JPJapanese actor and seiyū
- Kyoko Iwasakib. 1978JPJapanese swimmer
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 22 sources across 14 countries.
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
- Where does the name Iwasaki come from?
- ‘stone cape’; variously written, also pronounced Iwazaki and Iwagasaki. A common place name throughout Japan, found as a surname in western Japan and the Ryukyu Islands. Recorded by Dictionary of American Family Names.
- What does the name Iwasaki mean?
- Recorded meaning: ‘stone cape’; variously written, also pronounced Iwazaki and Iwagasaki.
- In which country does Iwasaki have the most bearers?
- In the United States, the national register counted about 943 people named Iwasaki, more than in any other country we hold.
- Where is Iwasaki most common?
- Measured as a share of residents rather than as a count, Iwasaki is densest in Finland — about 1 in 242 thousand people — even though United States holds more of our records for it.
- How common is the name Iwasaki?
- In the United States, the national register counted 943 people named Iwasaki in 2010, about 1 in 353 thousand residents.
What do you want to know about Iwasaki?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/iwasakiThe 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, “Iwasaki”. Data snapshot 2026-10-10.