Kayin
loc · Latin script
Meaning: Yoruba: 'long-awaited child'
(measured from records)Officially recorded in 8 countries · latest register: SSA, 2025
Kayin is a name written in the Latin script, with more bearers in the United States than in any other country.
- GYGuyana1 in 375K(measured from records)
- USUnited States1 in 525K
- NLNetherlands1 in 751K
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.
- United States (measured from records)
- Record sources
- 132 (measured from records)
- 1 in 375K (inferred from the name graph)
634 people, 2020
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Guyana
measured from records inferred from the name graph
Spellings & scripts
(measured from records)One other spelling is counted as the same name:
Locally spelled Ka-Yin in US United States, AU Australia, GB United Kingdom.
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)Yoruba: 'long-awaited child'
Cited for this meaning 1
- African Names
Where in the world
(measured from records)Kayin 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 | 634 | 1 in 525K | 486 | Ka-Yin | 132 |
| NG Nigeria | ≈68 est. | ≈1 in 3.2M | listed | — | 10 |
| NL Netherlands | 23 | 1 in 751K | 23 | — | 7 |
| GB United Kingdom | ≈18 est. | ≈1 in 3.6M | — | Ka-Yin | 24 |
| AU Australia | ≈11 est. | ≈1 in 2.4M | — | Ka-Yin | 20 |
| GY Guyana | 2 | 1 in 375K | 2 | — | 1 |
| CR Costa Rica | 2 | 1 in 2.5M | 2 | — | — |
634 people counted by Census Bureau — First Name Frequency 2020 by sex, 2020, counting the spelling kayin. 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; Meertens NVB — Nederlandse Voornamenbank (all-time BRP bearer counts, 2018); Guyana — Official List of Electors July 2025; TSE — electoral roll (padrón) names; the ng-naijafaker 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 recorded senses
(measured from records)Kayin 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 English, Alternative spelling of Cain.
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)13 registers and reference works attest this spelling, across 8 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 486 | #17,418 |
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 148 | #17,418 |
| US United States | SSA — National Baby Names (1880–present) | 2008 | 31 | — |
| US United States | SSA — National Baby Names (1880–present) | 2001 | 31 | — |
| US United States | SSA — National Baby Names (1880–present) | 2004 | 30 | — |
| US United States | SSA — National Baby Names (1880–present) | 2005 | 28 | — |
| US United States | SSA — National Baby Names (1880–present) | 2007 | 27 | — |
| US United States | SSA — National Baby Names (1880–present) | 2006 | 25 | — |
| US United States | SSA — National Baby Names (1880–present) | 1999 | 25 | — |
| US United States | SSA — National Baby Names (1880–present) | 2009 | 24 | — |
| NL Netherlands | Meertens NVB — Nederlandse Voornamenbank (all-time BRP bearer counts, 2018) | — | 23 | #10,770 |
| US United States | SSA — National Baby Names (1880–present) | 2016 | 23 | — |
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name Kayin mean, and where does it come from?
- Yoruba: 'long-awaited child' Recorded by African Names.
- In which country does Kayin have the most bearers?
- In the United States, the national register counted about 634 people named Kayin, more than in any other country we hold, where it is most often spelled Ka-Yin.
- Where is Kayin most common?
- Measured as a share of residents rather than as a count, Kayin is densest in Guyana — about 1 in 375 thousand people — even though United States holds more of our records for it.
- How common is the name Kayin?
- In the United States, the national register counted 634 people named Kayin in 2020, about 1 in 525 thousand residents.
What do you want to know about Kayin?
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/kayinThe 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, “Kayin”. Data snapshot 2026-10-13.