Jacomo
surname · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Jacomo is a surname written in the Latin script, with more bearers in Brazil than in any other country.
- BRBrazil≈1 in 133K(inferred from the name graph)
- PTPortugal≈1 in 675K
- ARArgentina1 in 858K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- Brazil (inferred from the name graph)
- Sources
- 64 (measured from records)
- ≈1 in 133K (inferred from the name graph)
≈1,600 people, est.
Highest-authority source
Brazil, est.
measured from records inferred from the name graph
Meaning & origin
No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.
Where in the world(measured from records)
Jacomo 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.
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: Brasil.IO genero-nomes (IBGE Censo 2010 mirror, CC-BY-SA); RENAPER — Apellidos (person counts, national); the portuguese-names-barbosa-1990 register; the il-grande-libro-nomi-bebe-2020 register; Danmarks Statistik — Hvor mange hedder...? (living-population name counts). 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)
- Georges Jacomob. 1957FRFrench association football player
- Meester JacomoIT17th-century painter, worked in Rome
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)
Attested in 17 sources across 13 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BR Brazil | Brasil.IO genero-nomes (IBGE Censo 2010 mirror, CC-BY-SA) | — | 523 | #5,973 |
| BR Brazil | IBGE — Nomes (census name API) | — | 511 | #14,106 |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2022 | 348 | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 348 | #17,190 |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1990 | 327 | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1980 | 296 | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1970 | 260 | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1960 | 201 | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 1950 | 117 | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | 1950 | 84 | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | 1940 | 61 | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | 1960 | 59 | — |
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
- In which country does Jacomo have the most bearers?
- Mondonomo estimates about 1.6 thousand people named Jacomo in Brazil, more than in any other country we hold, where it is most often spelled jacomo.
- How common is the name Jacomo?
- In Argentina, the national register counted 53 people named Jacomo, about 1 in 858 thousand residents.
What do you want to know about Jacomo?
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/jacomoThe same 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), and bulk access is licensed separately.
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, “Jacomo”. Data snapshot 2026-10-10.