Äi
given name · Latin script
Recorded as a female name· opposite-gender records fall within measured source noise
Äi is a given name written in the Latin script, with more bearers in Japan than in any other country, where it is the 63rd most common given name. Recorded meaning: Originated 1685–95, from Brazilian Portuguese aí, from Old Tupi.
- JPJapan≈1 in 681(inferred from the name graph)
- MYMalaysia≈1 in 1K
- CNChina≈1 in 17K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- Japan (inferred from the name graph)
- 2 (measured from records)
- Sources
- 180 (measured from records)
- ≈1 in 681 (inferred from the name graph)
≈180,000 people, est.
recorded for this name
Highest-authority source
Japan, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
Locally spelled Ai in JP Japan, US United States, MY Malaysia and 4 more.
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)
- Brazilian Portugueseaí(measured from records)
- OldTupi(measured from records)
Originated 1685–95, from Brazilian Portuguese aí, from Old Tupi.
Sources 7
- A concise dictionary of first names
- 국립국어원 외래어 표기 용례 자료 (NIKL loanword/foreign-name transcription examples)
- A Frequency Dictionary of Portuguese
- Wiktionary
- Chinese Surnames Encyclopedia (Section 2)
Attested across 37 languages in the etymology graph.
Where in the world(measured from records)
Äi 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 | ||||
|---|---|---|---|---|---|---|
| JP Japan | #63 | ≈180,000 est. | ≈1 in 681 | listed | Ai | 154 |
| CN China | — | ≈83,000 est. | ≈1 in 17K | — | Ai | 108 |
| MY Malaysia | — | ≈31,000 est. | ≈1 in 1K | — | Ai | 35 |
| TW Taiwan | — | ≈7,900 est. | ≈1 in 3K | — | Ai | 79 |
| US United States | — | 3,483 | 1 in 96K | 2.9K | Ai | 180 |
| SG Singapore | #816 | ≈1,900 est. | ≈1 in 3.3K | — | Ai | 55 |
| HK Hong Kong | #782 | ≈670 est. | ≈1 in 11K | — | Ai | 27 |
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 — First Name Frequency 2020 by sex. 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 recorded senses(measured from records)
Äi is also recorded in 3 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Estonian, father-in-law (one's spouse's father)
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In vep, many, much
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In stq, river
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.
Evidence(measured from records)
No register attests this spelling yet
Frequently asked questions
- What does the name Äi mean, and where does it come from?
- Originated 1685–95, from Brazilian Portuguese aí, from Old Tupi. Recorded by A concise dictionary of first names and 국립국어원 외래어 표기 용례 자료 (NIKL loanword/foreign-name transcription examples) and 5 other sources.
- Is Äi a male or female name?
- Äi is a female 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.
- In which country does Äi have the most bearers?
- Mondonomo estimates about 184 thousand people named Äi in Japan, more than in any other country we hold, where it is most often spelled ai.
- How common is the name Äi?
- In the United States, the national register counted 3,483 people named Äi in 2020, about 1 in 96 thousand residents.
- How common is Äi compared with other names?
- In Japan, Äi is the 63rd most common given name of 366,905 given names recorded there.
What do you want to know about Äi?
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/%C3%A4iThe 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, “Äi” — the 63rd most common given name in Japan. Data snapshot 2026-10-10.