Castaldo
surname · Latin script
Meaning: steward
Recorded for both men and women· direction only, no split published
/kɑˈstɑɫdoʊ/(machine-generated) pronunciation, model-generated
Castaldo 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)
- UYUruguay1 in 58K
- CHSwitzerland1 in 124K
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
- 118 (measured from records)
- 1 in 58K (inferred from the name graph)
2,222 people, 2010
Highest-authority source
Uruguay
measured from records inferred from the name graph
Meaning & origin(measured from records)
steward
Sources 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested across 4 languages in the etymology graph.
Where in the world(measured from records)
Castaldo 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 | — | 2,222 | 1 in 150K | 2.2K | Castaldo | 78 |
| AR Argentina | — | 271 | 1 in 168K | 271 | — | — |
| BR Brazil | — | 207 | 1 in 1M | 207 | — | — |
| CH Switzerland | — | 68 | 1 in 124K | 68 | Castaldo | 5 |
| UY Uruguay | — | 58 | 1 in 58K | 58 | — | — |
| DK Denmark | — | 10 | 1 in 587K | 10 | — | — |
| IT Italy | #436 | ≈2 est. | ≈1 in 35M | listed | Castaldo | 118 |
2,222 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: the italian-surnames-defelice-1978 register; Census Bureau — Surname Frequency 2010; RENAPER — Apellidos (person counts, national); IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); BFS — Familiennamen der Wohnbevölkerung (surnames); INE Uruguay — Apellidos más frecuentes 1902–2024 (Tableau Public); 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).
Other recorded senses(measured from records)
Castaldo 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, do germ. Gastald; administrador dos bens do soberano, depois do Estado
as a nameDicionário dos sobrenomes italianos
In Italian, Variante di Castaldi
as a nameDizionario dei cognomi italiani
In Latin, dative/ablative singular of castaldus
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)
- Giovanni Battista Castaldob. 1493ITItalian condottiero
- Alfonso Castaldob. 1890ITCatholic cardinal (1890–1966)
- Joseph Castaldob. 1927USAmerican composer (1927-2000)
- Gino Castaldob. 1950ITItalian journalist
- Radio Manb. 1951USnot in their usual nameAmerican actor
- Michéal Castaldob. 1962USItalian-born American singer
- Luigi Castaldob. 1982ITItalian footballer
- Matteo Castaldob. 1985ITItalian rower
- Fabio Massimo Castaldob. 1985ITItalian politician
- Paolo CastaldoITItalian civil engineer
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 24 sources across 15 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 2.2K | #13,627 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 2.1K | #13,554 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 1.8K | #15,568 |
| AR Argentina | RENAPER — Apellidos (person counts, national) | — | 271 | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 207 | #35,763 |
| CH Switzerland | BFS — Familiennamen der Wohnbevölkerung (surnames) | 2024 | 68 | #14,835 |
| UY Uruguay | INE Uruguay — Apellidos más frecuentes 1902–2024 (Tableau Public) | — | 58 | — |
| DK Denmark | Danmarks Statistik — Hvor mange hedder...? (living-population name counts) | — | 10 | #40,878 |
| IT Italy | Dizionario dei Cognomi Italiani (De Felice, 1978) | — | — | — |
| 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
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- 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 Castaldo mean, and where does it come from?
- steward Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- How do you pronounce Castaldo?
- A machine transcription gives /kɑˈstɑɫdoʊ/ (IPA) for English.
- In which country does Castaldo have the most bearers?
- In the United States, the national register counted about 2.2 thousand people named Castaldo, more than in any other country we hold, where it is most often spelled castaldo.
- Where is Castaldo most common?
- Measured as a share of residents rather than as a count, Castaldo is densest in Uruguay — about 1 in 58 thousand people — even though United States holds more of our records for it.
- How common is the name Castaldo?
- In the United States, the national register counted 2,222 people named Castaldo in 2010, about 1 in 150 thousand residents.
- How common is Castaldo compared with other names?
- In Italy, Castaldo is the 436th most common surname of 502,013 surnames recorded there.
What do you want to know about Castaldo?
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/castaldoThe 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, “Castaldo” — the 436th most common surname in Italy. Data snapshot 2026-10-10.