Fierro
surname · Latin script
Meaning: branding iron
Recorded for both men and women· direction only, no split published
/fjero/(machine-generated) pronunciation, model-generated
Fierro is a surname written in the Latin script, with more bearers in the United States than in any other country.
- UYUruguay1 in 1.4K(measured from records)
- CLChile≈1 in 2.5K
- ECEcuador1 in 3.1K
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
- 316 (measured from records)
- 1 in 1.4K (inferred from the name graph)
14,371 people, 2010
Highest-authority source
Uruguay
measured from records inferred from the name graph
Meaning & origin(measured from records)
branding iron
Sources 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested across 4 languages in the etymology graph.
Where in the world(measured from records)
Fierro 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 | — | 14,371 | 1 in 23K | 14K | Fierro | 316 |
| CO Colombia | #514 | ≈9,400 est. | ≈1 in 5.2K | 6 | Fierro | 99 |
| CL Chile | #334 | ≈7,200 est. | ≈1 in 2.5K | — | Fierro | 95 |
| EC Ecuador | #575 | 5,538 | 1 in 3.1K | 5.5K | Fierro | 57 |
| AR Argentina | — | 3,702 | 1 in 12K | 3.7K | Fierro | 73 |
| PE Peru | — | ≈2,700 est. | ≈1 in 12K | — | Fierro | 50 |
| UY Uruguay | #244 | 2,352 | 1 in 1.4K | 2.4K | Fierro | 35 |
14,371 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: Census Bureau — Surname Frequency 2010; RENAPER — Apellidos (person counts, national); the co-datosgov-candidates register; INEC — civil registry names; INE Uruguay — Apellidos más frecuentes 1902–2024 (Tableau Public). 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)
Fierro is also recorded in 4 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Arabic, iron; Morocco; other origin
as a nameDicionario Sefaradi De SobrenomesDictionary Of Sephardic Surnames Inclusive Cristaos-Novos, Conversos, Marranos, Italianos,…
In Italian, variante regional de Ferro
as a nameDicionário dos sobrenomes italianos
In nap, iron (metal)
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In Aragonese, iron
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
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)
- Pancho Fierrob. 1807PEPeruvian artist (1807–1879)
- Aurelio Fierrob. 1923ITItalian actor and singer (1923-2005)
- Lee Fierrob. 1929USAmerican actress
- Julieta Norma Fierro Gossmanb. 1948MXMexican astrophysicist
- Maribel Fierrob. 1956ESSpanish Middle Eastern scholar
- Juan Fierrob. 1974CLChilean racing cyclist
- Eduardo Fierrob. 1988BOBolivian footballer
- Óscar Valdezb. 1990MXnot in their usual nameMexican boxer (born 1990)
- Carlos Fierrob. 1994MXMexican association football player
- Adam FierroUSAmerican writer
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 32 sources across 20 countries.
Reference works 4
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- Wikipedia surname tokens
- Wikidata name items (native-script + romanized given/family names)
- Cognomix.it (Nomix s.r.l.) — Italian surname origin dictionary
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 Fierro mean, and where does it come from?
- branding iron Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- What are other forms of the name Fierro?
- In the etymology graph, Ferrar is a form of the same name in other languages.
- How do you pronounce Fierro?
- A machine transcription gives /fjero/ (IPA) for Spanish.
- In which country does Fierro have the most bearers?
- In the United States, the national register counted about 14 thousand people named Fierro, more than in any other country we hold, where it is most often spelled fierro.
- Where is Fierro most common?
- Measured as a share of residents rather than as a count, Fierro is densest in Uruguay — about 1 in 1.4 thousand people — even though United States holds more of our records for it.
- How common is the name Fierro?
- In the United States, the national register counted 14,371 people named Fierro in 2010, about 1 in 23 thousand residents.
- How common is Fierro compared with other names?
- In Uruguay, Fierro is the 244th most common surname of 57,630 surnames recorded there.
What do you want to know about Fierro?
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/fierroThe 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, “Fierro” — the 244th most common surname in Uruguay. Data snapshot 2026-10-10.