Séin
given name · Latin script
Séin is a given name written in the Latin script, with more bearers in Kenya than in any other country. Recorded meaning: (verb) to be; (aux) (past tense).
- USUnited States1 in 441K(measured from records)
- EEEstonia≈1 in 11K
- PRPuerto Rico≈1 in 16K
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.
- Kenya (inferred from the name graph)
- Sources
- 153 (measured from records)
- ≈1 in 11K (inferred from the name graph)
≈1,100 people, est.
Highest-authority source
Estonia, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Locally spelled Sein in US United States, MY Malaysia, SG Singapore and 3 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)
(verb) to be; (aux) (past tense)
Sources 4
- 국립국어원 외래어 표기 용례 자료 (NIKL loanword/foreign-name transcription examples)
- A Frequency Dictionary of German
- Deshayes, Dictionnaire étymologique du breton (2003)
- Trask, Etymological Dictionary of Basque (2008 posthumous draft)
Attested across 14 languages in the etymology graph.
Where in the world(measured from records)
Séin 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 | ||||
|---|---|---|---|---|---|---|
| KE Kenya | — | ≈1,100 est. | ≈1 in 47K | — | Sein | 8 |
| US United States | — | 755 | 1 in 441K | 1.1K | Sein | 153 |
| MY Malaysia | — | ≈360 est. | ≈1 in 90K | — | Sein | 20 |
| AR Argentina | — | 265 | 1 in 172K | 265 | — | 1 |
| ES Spain | — | 215 | 1 in 233K | 215 | — | 12 |
| PR Puerto Rico | #939 | ≈200 est. | ≈1 in 16K | — | Sein | 5 |
| SG Singapore | — | ≈130 est. | ≈1 in 47K | — | Sein | 15 |
| EE Estonia | — | ≈120 est. | ≈1 in 11K | listed | Sein | 6 |
| NO Norway | — | 68 | 1 in 80K | 68 | — | 3 |
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; RENAPER — Apellidos (person counts, national); INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); SSB — Navnesøk (name-search service, living population). 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).
Evidence(measured from records)
No register attests this spelling yet
Frequently asked questions
- What does the name Séin mean, and where does it come from?
- (verb) to be; (aux) (past tense) Recorded by 국립국어원 외래어 표기 용례 자료 (NIKL loanword/foreign-name transcription examples) and A Frequency Dictionary of German and 2 other sources.
- Is Séin a male or female name?
- Séin is recorded for both men and women. We don't publish a percentage split: a record's gender belongs to the person and is attached to every given name on that record, so names in cultures where a name string also carries a parent's or spouse's given name pick up large cross-gender counts.
- In which country does Séin have the most bearers?
- Mondonomo estimates about 1.1 thousand people named Séin in Kenya, more than in any other country we hold, where it is most often spelled sein.
- How common is the name Séin?
- In the United States, the national register counted 755 people named Séin in 2010, about 1 in 441 thousand residents.
- How common is Séin compared with other names?
- In Puerto Rico, Séin is the 939th most common surname of 8,205 surnames recorded there.
What do you want to know about Séin?
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/s%C3%A9inThe 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, “Séin” — the 939th most common surname in Puerto Rico. Data snapshot 2026-10-10.