Sergii
given name · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
/sɝdʒi/(machine-generated) pronunciation, model-generated
Sergii is a given name written in the Latin script, with more bearers in Russia than in any other country.
- USUnited States1 in 444K(measured from records)
- CNChina≈1 in 1.5M
- RURussia≈1 in 18Kas Сергеевич
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 Sergii 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.
- Russia (inferred from the name graph)
- 2 (measured from records)
- Sources
- 173 (measured from records)
- ≈1 in 6.0K (inferred from the name graph)
≈7,800 named Сергеевич, est.
recorded for this name
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 Сергеевич in RU Russia, CN China.
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 6 languages in the etymology graph.
Where in the world(measured from records)
Sergii 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 | ||||
|---|---|---|---|---|---|---|
| RU Russia | — | ≈7,800 est. | ≈1 in 18K | — | Сергеевич | 163 |
| PL Poland | — | 5,975 | 1 in 6.4K | 6K | Sergii | 71 |
| CN China | — | ≈960 est. | ≈1 in 1.5M | — | Сергеевич | 11 |
| US United States | — | 750 | 1 in 444K | 746 | Sergii | 173 |
| ES Spain | — | 655 | 1 in 76K | 655 | Sergii | 42 |
| EE Estonia | #452 | ≈210 est. | ≈1 in 6K | 199 | Sergii | 13 |
| LV Latvia | — | 143 | 1 in 13K | 143 | — | 9 |
| CY Cyprus | — | ≈43 est. | ≈1 in 29K | — | Sergii | 15 |
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: dane.gov.pl — PESEL given names (first + second name position, 2026-01-20); Census Bureau — First Name Frequency 2020 by sex; INE — Padrón per-token widgets (current living counts, given + apellidos); the ee-stat-nimed register; PMLP — Personu vārdi (given names in population 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)
Sergii 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 Russian, var of Sergei.
as a wordA Dictionary of Period Russian Names (Wickenden / Goldschmidt 1996)
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.
Notable people with this name(measured from records)
- Sergii ChalyiUAD.Sc. Kharkiv National University of Radioelectronics 2007, researcher, ORCID id # 0000-0002-9982-9091
- Sergii RomanenkoUAresearcher
- Sergii Afoninresearcher
- Sergii Sologubresearcher
- Sergii IvakhnoGBPh.D. University of Cambridge 2011
- Sergii Yakuninresearcher
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).
How to address them(machine-generated)
A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.
Evidence(measured from records)
Attested in 27 sources across 15 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| PL Poland | dane.gov.pl — PESEL given names (first + second name position, 2026-01-20) | 2026 | 6K | #216 |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 5.9K | #216 |
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 746 | #15,369 |
| ES Spain | INE — Padrón per-token widgets (current living counts, given + apellidos) | — | 655 | #3,821 |
| ES Spain | INE — Nombres más frecuentes (Padrón Municipal) | — | 303 | #3,008 |
| EE Estonia | Statistics Estonia — per-name Population Register counts (nimed) | — | 199 | #485 |
| LV Latvia | PMLP — Personu vārdi (given names in population register) | — | 143 | — |
| LV Latvia | PMLP — Personvārdu meklētājs (per-name population-register lookup) | — | 140 | #1,034 |
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 4 | #15,369 |
| PL Poland | Ministry of Digitalization — Imiona nadawane dzieciom w Polsce (2000–present) | 2023 | 2 | — |
| EE Estonia | Siseministeerium — population register name list 2023 | 2023 | — | — |
Reference works 1
- Wikidata name items (native-script + romanized given/family names)
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- How do you pronounce Sergii?
- A machine transcription gives /sɝdʒi/ (IPA) for Ukrainian.
- Is Sergii a male or female name?
- Sergii is a male 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 Sergii have the most bearers?
- Mondonomo estimates about 7.8 thousand people named Сергеевич in Russia, more than in any other country we hold.
- How common is the name Sergii?
- In Poland, the national register counted 5,975 people named Sergii in 2026, about 1 in 6.4 thousand residents.
- How common is Sergii compared with other names?
- In Estonia, Sergii is the 452nd most common given name of 9,600 given names recorded there.
What do you want to know about Sergii?
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/sergiiThe 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, “Sergii” — the 452nd most common given name in Estonia. Data snapshot 2026-10-10.