Seijin
given name · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Seijin is a given name written in the Latin script, with more bearers in South Korea than in any other country.
- KRSouth Korea≈1 in 1.5Kas 세진(inferred from the name graph)
- USUnited States1 in 1.1Mas Sejin
- BEBelgium≈1 in 829Kas Sejin
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 Seijin 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.
- South Korea (inferred from the name graph)
- 2 (measured from records)
- Sources
- 120 (measured from records)
- ≈1 in 1.5K (inferred from the name graph)
≈35,000 named 세진, est.
recorded for this name
Highest-authority source
South Korea, est., as 세진
measured from records inferred from the name graph
Spellings & scripts(measured from records)
Locally spelled Sejin in US United States, SG Singapore, BE Belgium, Seojin in AU Australia, DE Germany, CN China and 세진 in KR South Korea.
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
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)
Seijin 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 | ||||
|---|---|---|---|---|---|---|
| KR South Korea | #364 | ≈35,000 est. | ≈1 in 1.5K | — | 세진 | 86 |
| CN China | — | ≈960 est. | ≈1 in 1.5M | — | Seojin | 5 |
| US United States | — | 315as Sejin | 1 in 1.1M | 159 | Sejin | 120 |
| DE Germany | — | ≈40 est. | ≈1 in 2M | — | Seojin | 13 |
| AU Australia | — | ≈31 est. | ≈1 in 834K | — | Seojin | 18 |
| BE Belgium | — | ≈14 est. | ≈1 in 829K | — | Sejin | 2 |
| SG Singapore | — | ≈7 est. | ≈1 in 875K | — | Sejin | 6 |
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).
Notable people with this name(measured from records)
- Seijin Murakamib. 1884JPJapanese translator
- Seijin Noborikawab. 1932JPJapanese musician and folk singer (1932–2013)
- Seijin Oikawab. 1970JPJapanese motorcycle racer
- Seijin Takenokob. 1979JPJapanese mangaka and illustrator
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)
No register attests this spelling yet
Frequently asked questions
- Is Seijin a male or female name?
- Seijin 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 Seijin have the most bearers?
- Mondonomo estimates about 35 thousand people named 세진 in South Korea, more than in any other country we hold.
- How common is the name Seijin?
- In the United States, the national register counted 315 people named Sejin in 2020, about 1 in 1.1 million residents.
- How common is Seijin compared with other names?
- In South Korea, Seijin is the 364th most common given name of 67,037 given names recorded there.
What do you want to know about Seijin?
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/seijinThe 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, “Seijin” — the 364th most common given name in South Korea. Data snapshot 2026-10-10.