Sebastiao
given name · Portuguese · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Sebastiao is a given name, with more bearers in Brazil than in any other country, where it is the 42nd most common given name. It appears chiefly in Portuguese and English, written in the Latin script. Recorded meaning: pers. name, Portuguese.
- BRBrazil1 in 615◐
- PTPortugal1 in 5K
- USUnited States1 in 1.1M
carrying the name, one hue, darker where it is more common. Hover a country for its figure.
- ≈345K ●
- #287 ●
- Sources
- 158 ●
- 1 in 615 ◐
across 9 countries
of 16M given names
59K records
Official registry-verified
Brazil
Spellings & scripts●
Locally spelled Sebastião in NL Netherlands.
Meaning & origin◐
pers. name, Portuguese
Attested across 18 languages in the etymology graph.
Where in the world●
Sorted by bearers counted by national registers, records where none counts.
| Country | Most common spelling | Sources | |||||
|---|---|---|---|---|---|---|---|
| BR Brazil | #42 | 344,228△ | 47K rec. | 1 in 615 | 463K | Sebastiao | 158 |
| PT Portugal | #406 | 1,678 | 504 rec. | — | listed | Sebastiao | 71 |
| AO Angola | #44 | 979 | 1.4K rec. | — | 2 | Sebastiao | 37 |
| IN India | — | 709 | 675 rec. | — | 68 | Sebastiao | 24 |
| GB United Kingdom | — | 468 | 599 rec. | — | listed | Sebastiao | 44 |
| AR Argentina | — | 338 | 708 rec. | — | 76 | Sebastiao | 24 |
| US United States | — | 310 | 5.2K rec. | 1 in 1.1M | 310 | Sebastiao | 100 |
| ZA South Africa | — | 275 | 373 rec. | — | — | Sebastiao | 13 |
| PY Paraguay | — | 171 | 120 rec. | — | — | Sebastiao | 5 |
| DE Germany | — | 170 | 271 rec. | — | — | Sebastiao | 42 |
| MZ Mozambique | #46 | 138 | 34 rec. | — | 3 | Sebastiao | 22 |
| VE Venezuela | — | 133 | 151 rec. | — | — | Sebastiao | 9 |
Roughly 344K people in Brazil bear this name (about 1 in 615). Estimates project the name's share of our records onto national population, so each is only as good as the record base beside it — the Basis column gives that base; rows marked △ rest on fewer records than the estimate itself and are order-of-magnitude at best.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table. How that works.
Languages●
- Portuguese7.9M96%
- English346K4%
- Hindi1.7K1%
- French1.4K1%
- ptbr1.2K1%
Show as table
| Name | Records | Note |
|---|---|---|
| Portuguese | 7,905,356 | 96% |
| English | 346,279 | 4% |
| Hindi | 1,681 | 1% |
| French | 1,381 | 1% |
| ptbr | 1,248 | 1% |
Language is read off each record's context, not declared by the bearer; a share is of all records for this spelling.
Over time●
Show as table
| Year | records |
|---|---|
| 1930 | 5 |
| 1940 | 17,948 |
| 1950 | 70,804 |
| 1960 | 162,298 |
| 1970 | 251,115 |
| 1980 | 300,550 |
| 1990 | 325,592 |
| 2000 | 336,540 |
| 2010 | 341,550 |
| 2020 | 343,628 |
| 2022 | 344,228 |
BR IBGE — names by decade (Kaggle mirror) — 11 years between 1930–2022. One register's own figures, never a sum across registers: two registers counting the same people would double them.
Evidence●
Attested in 38 sources across 22 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BR Brazil | IBGE — Nomes (census name API) | — | 463K | #88 |
| BR Brazil | Brasil.IO genero-nomes (IBGE Censo 2010 mirror, CC-BY-SA) | — | 461K | #35 |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2022 | 344K | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2020 | 344K | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 343K | #79 |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2010 | 342K | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2000 | 337K | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1990 | 326K | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1980 | 301K | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1970 | 251K | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1960 | 162K | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | 1950 | 91K | — |
Reference works 3
- Dictionary of American Family Names
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- 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 2026-09-12 data build · 110 rows in the corpus for this spelling.
Frequently asked questions
- How common is the name Sebastiao?
- We estimate roughly 345 thousand people bear Sebastiao (counting its spellings and scripts) across 9 countries in our records.
- In which country does Sebastiao have the most bearers?
- We estimate about 344 thousand people bear Sebastiao in Brazil, more than in any other country in our records, where it is most often spelled sebastiao.
- Where is Sebastiao most common?
- Sebastiao is densest in Brazil, where the national register counts about 1 in 615 people carrying it.
- How common is Sebastiao compared with other names?
- In Brazil, Sebastiao is the 42nd most common given name of 536,280 given names recorded there.
- Is Sebastiao a male or female name?
- Sebastiao 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.
- What does the name Sebastiao mean?
- Recorded meaning: pers. name, Portuguese
Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/sebastiaoThe same payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. Rate-limited for casual use. Bulk access and licensing.
About this data
Data snapshot . Figures are rebuilt periodically and will change.
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, “Sebastiao” — the 42nd most common given name in Brazil. Data snapshot 2026-09-12.