Girolamo
surname · Latin script
Meaning: from a popular variant of the personal name Geronimo, from Greek Hierdnymos (see Hieronymus)
Recorded as a male name· opposite-gender records fall within measured source noise
/dʒɪɹoʊˈɫɑmoʊ/(machine-generated) pronunciation, model-generated
Girolamo is a surname written in the Latin script, with more bearers in the United States than in any other country.
- ITItaly≈1 in 35M(inferred from the name graph)
- CHSwitzerland1 in 263K
- ARArgentina1 in 413K
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.
- United States (measured from records)
- Sources
- 137 (measured from records)
- 1 in 263K (inferred from the name graph)
558 people, 2010
Highest-authority source
Switzerland
measured from records inferred from the name graph
Meaning & origin(measured from records)
from a popular variant of the personal name Geronimo, from Greek Hierdnymos (see Hieronymus).
Sources 1
- Dictionary of American Family Names
Attested across 9 languages in the etymology graph.
Where in the world(measured from records)
Girolamo 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 | — | 558 | 1 in 596K | 558 | Girolamo | 106 |
| BR Brazil | — | 275 | 1 in 770K | 275 | — | 1 |
| AR Argentina | — | 110 | 1 in 413K | 110 | — | — |
| CH Switzerland | — | 32 | 1 in 263K | 32 | Girolamo | 24 |
| IT Italy | #411 | ≈2 est. | ≈1 in 35M | 12 | Girolamo | 137 |
| BE Belgium | — | 1 | 1 in 12M | 1 | Girolamo | 12 |
558 people counted by Census Bureau — Surname Frequency 2010, 2010. 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: ISTAT — Contanomi newborn per-name series (1999–2024, JSONP backend); Census Bureau — Surname Frequency 2010; IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); RENAPER — Apellidos (person counts, national); BFS — Familiennamen der Wohnbevölkerung (surnames); Familienaam.be — Belgian family-name frequency (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)
Girolamo is also recorded in 3 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Italian, a male given name, equivalent to English Jerome
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In Italian, forma italiana de Hieronymus
as a nameDicionário dos sobrenomes italianos
Italian: vernacular form of JEROME , much more common than the learned form GERONIMO .
as a word
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)
- Heidi GirolamoAUAustralian politician
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)
Evidence(measured from records)
Attested in 31 sources across 16 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 558 | #39,419 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 542 | #43,008 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 540 | #38,524 |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 275 | #28,398 |
| AR Argentina | RENAPER — Apellidos (person counts, national) | — | 110 | — |
| CH Switzerland | BFS — Familiennamen der Wohnbevölkerung (surnames) | 2024 | 32 | #26,077 |
| BE Belgium | Familienaam.be — Belgian family-name frequency (population register) | 2008 | 1 | #159,861 |
| IT Italy | 意大利语姓名译名手册 (Xinhua Italian Name Manual) | — | — | — |
| US United States | wru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.) | — | — | — |
Reference works 3
- Dictionary of American Family Names
- Wikipedia given-name tokens
- 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
- What does the name Girolamo mean, and where does it come from?
- from a popular variant of the personal name Geronimo, from Greek Hierdnymos (see Hieronymus). Recorded by Dictionary of American Family Names.
- How do you pronounce Girolamo?
- A machine transcription gives /dʒɪɹoʊˈɫɑmoʊ/ (IPA) for English.
- What are other forms of the name Girolamo?
- In the etymology graph, Hieronymus, Gerolamo and Hieronym are forms of the same name in other languages.
- In which country does Girolamo have the most bearers?
- In the United States, the national register counted about 558 people named Girolamo, more than in any other country we hold, where it is most often spelled girolamo.
- Where is Girolamo most common?
- Measured as a share of residents rather than as a count, Girolamo is densest in Switzerland — about 1 in 263 thousand people — even though United States holds more of our records for it.
- How common is the name Girolamo?
- In the United States, the national register counted 558 people named Girolamo in 2010, about 1 in 596 thousand residents.
- How common is Girolamo compared with other names?
- In Italy, Girolamo is the 411th most common surname of 502,013 surnames recorded there.
What do you want to know about Girolamo?
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/girolamoThe 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, “Girolamo” — the 411th most common surname in Italy. Data snapshot 2026-10-10.