Σέι
surname · Greek script
Recorded as a male name· opposite-gender records fall within measured source noise
Σέι is a surname written in the Greek script, with more bearers in the United States than in any other country.
- GRGreece≈1 in 4.8M(inferred from the name graph)
- USUnited States1 in 24Kas Shay
- GYGuyana1 in 94Kas Shay
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 Σέι 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
- 16 (measured from records)
- ≈1 in 4.8M (inferred from the name graph)
13,892 named Shay, 2020
recorded for this name
Highest-authority source
Greece, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
Locally spelled Shay in US United States and Shaye in GR Greece.
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 in 1 language in the etymology graph.
Where in the world(measured from records)
Σέι 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 | 13,892as Shay | 1 in 24K | 9.3K | Shay | 16 |
| PL Poland | 278as Shay | 1 in 138K | 204 | — | — |
| BR Brazil | 70as Shay | 1 in 3M | 654 | — | — |
| SE Sweden | 50as Sei | 1 in 204K | 50 | — | — |
| ES Spain | 27as Shay | 1 in 1.9M | 32 | — | 1 |
| DK Denmark | 18as Shay | 1 in 326K | 9 | — | — |
| GY Guyana | 8as Shay | 1 in 94K | 8 | — | — |
| GR Greece | ≈2 est. | ≈1 in 4.8M | — | Shaye | 7 |
13,892 people counted by Census Bureau — First Name Frequency 2020 by sex, 2020. 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; IBGE — names by decade (Kaggle mirror); IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); dane.gov.pl — PESEL given names (first + second name position, 2026-01-20); Skatteverket — Sök hur många som har ett visst namn (living population); INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); Danmarks Statistik — Hvor mange hedder...? (living-population name counts); Guyana — Official List of Electors July 2025. 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
- In which country does Σέι have the most bearers?
- In the United States, the national register counted about 14 thousand people named Shay, more than in any other country we hold.
- How common is the name Σέι?
- In the United States, the national register counted 13,892 people named Shay in 2020, about 1 in 24 thousand residents.
What do you want to know about Σέι?
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/%CF%83%CE%AD%CE%B9The 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, “Σέι”. Data snapshot 2026-10-10.