Sebastijan
given name · Latin script
A male name· listed as male by the registers that count names by sex
(measured from records)Officially recorded in 15 countries · latest register: dane.gov.pl, 2026
/séːbastijan/(machine-generated) Slovenian · model-generated
Sebastijan is a male given name written in the Latin script, with more bearers in Brazil than in any other country. In Poland it is the 66th most common given name.
- HRCroatia1 in 3.6K(measured from records)
- ATAustria≈1 in 110K
- SKSlovakia≈1 in 230Kfew records
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 Sebastijan itself, the figure is that spelling’s, and it is named. Countries with no figure are shown too: flat where a national register lists the name without counting it, hatched where only our records hold it. One hue, darker where it is more common; hover a country for its figure.
- Brazil (measured from records)
- 2 (measured from records)
- Record sources
- 291 (measured from records)
- 1 in 3.6K (inferred from the name graph)
344,228 named Sebastiao, 2022
recorded for this name
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Croatia
measured from records inferred from the name graph
Spellings & scripts
(measured from records)Locally spelled Sebastian in PL Poland, US United States, ES Spain and 2 more and Себастьян in FI Finland.
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 13 languages in the etymology graph.
Where in the world
(measured from records)Sebastijan 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 | ||||
|---|---|---|---|---|---|---|
| BR Brazil | — | 344,228as Sebastiao | 1 in 615 | 463K | — | 2 |
| PL Poland | #66 | 186,060as Sebastian | 1 in 206 | 186K | Sebastian | 215 |
| US United States | — | 156,144as Sebastian | 1 in 2.1K | 156K | Sebastian | 291 |
| ES Spain | — | 44,158as Sebastian | 1 in 1.1K | 44K | Sebastian | 70 |
| SE Sweden | — | 39,744as Sebastian | 1 in 257 | 40K | Sebastian | 58 |
| NL Netherlands | — | 34,002as Sebastiaan | 1 in 508 | 34K | Sebastian | 54 |
| DK Denmark | — | 16,088as Sebastian | 1 in 365 | 16K | — | — |
| FI Finland | — | 15,447as Sebastian | 1 in 361 | 18K | Себастьян | 16 |
| HR Croatia | #420 | 1,166 | 1 in 3.6K | 1.2K | Sebastijan | 69 |
344,228 people counted by IBGE — names by decade (Kaggle mirror), 2022. 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: IBGE — names by decade (Kaggle mirror); IBGE — Nomes (census name API); 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); Skatteverket — Sök hur många som har ett visst namn (living population); Meertens NVB — Nederlandse Voornamenbank (all-time BRP bearer counts, 2018); DVV — Etunimitilasto (Finnish given names register); DVV — Nimipalvelu (Finnish name service, per-name lookup); Danmarks Statistik — Hvor mange hedder...? (living-population name counts); DZS — Imena i prezimena (per-token lookup form); DZS — Učestalost osobnih imena (Popis 2021). 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)- Sebastijan Sladeb. 1699HRRagusan writer
- Sebastijan Pregeljb. 1970SISlovene writer
- Sebastian Cavazzab. 1973SISlovenian actor
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)26 registers and reference works attest this spelling, across 15 countries.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What are other forms of the name Sebastijan?
- In the etymology graph, Sebastian, Sébastien and Bastien are forms of the same name in other languages; Boštjan is a recorded short or pet form.
- How do you pronounce Sebastijan?
- In Slovenian /séːbastijan/. Transcriptions are machine-generated except where a dictionary is named.
- Is Sebastijan a male or female name?
- Sebastijan is a male name. National registers that list it by sex list it as male: Slovenia (SURS, 2025) and Kosovo (ASK Kosovo).
- Which countries have the most people named Sebastijan?
- In Brazil, the national register counted about 344 thousand people named Sebastiao, more than in any other country we hold. After it come Poland, United States, Spain and Sweden; the country table on this page ranks them.
- Where is Sebastijan most common?
- Measured as a share of residents rather than as a count, Sebastijan is densest in Croatia — about 1 in 3.6 thousand people — even though Brazil holds more of our records for it.
- How common is the name Sebastijan?
- In Croatia, the national register counted 1,166 people named Sebastijan in 2021, about 1 in 3.6 thousand residents.
- How common is Sebastijan compared with other names?
- In Poland, Sebastijan is the 66th most common given name of 25,969 given names recorded there.
What do you want to know about Sebastijan?
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/sebastijanThe 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, “Sebastijan” — the 66th most common given name in Poland. Data snapshot 2026-10-13.