Casu
surname · Latin script
Recorded for both men and women· direction only, no split published
/kasu/(machine-generated) pronunciation, model-generated
Casu is a surname written in the Latin script, with more bearers in Italy than in any other country.
- FRFrance≈1 in 122K(inferred from the name graph)
- ITItaly≈1 in 13K
- CHSwitzerland1 in 133K
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.
- Italy (inferred from the name graph)
- Sources
- 145 (measured from records)
- ≈1 in 13K (inferred from the name graph)
≈4,700 people, est.
Highest-authority source
Italy, 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)
Casu 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 | |||
|---|---|---|---|---|---|
| IT Italy | ≈4,700 est. | ≈1 in 13K | listed | Casu | 50 |
| PK Pakistan | ≈950 est. | ≈1 in 246K | — | Casu | 1 |
| FR France | ≈560 est. | ≈1 in 122K | 58 | Casu | 145 |
| DE Germany | ≈240 est. | ≈1 in 331K | — | Casu | 50 |
| BR Brazil | 178 | 1 in 1.2M | 178 | — | — |
| CH Switzerland | 63 | 1 in 133K | 63 | Casu | 5 |
| BE Belgium | 41 | 1 in 286K | 41 | Casu | 7 |
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: INSEE — Fichier des noms de famille (1891–2000); the xinhua-italian-manual register; IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); 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)
Casu 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 Latin, ablative singular of cāsus (“a fall; falling down; accident, occurrence, chance event; end, termination; case”)
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In dsb, locative singular of cas
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In scn, cheese
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 Casub. 1933ITItalian musician
- Antonio Casub. 1955ITItalian librarian (born 1955)
- Antonella Casub. 1967ITItalian politician
- Giuseppe Casub. 1968ITdocumentary filmmaker
- Franco Casub. 1969ITItalian jockey
- Andrea Casub. 1981ITItalian politician (1981)
- Benedetta CasuDEGerman physicist
- Alberto CasuITresearcher
- Giulia CasuITresearcher
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 20 sources across 15 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 178 | #40,411 |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1961 | 123 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1951 | 78 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1981 | 76 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1971 | 69 | — |
| CH Switzerland | BFS — Familiennamen der Wohnbevölkerung (surnames) | 2024 | 63 | #15,671 |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1991 | 58 | — |
| BE Belgium | Familienaam.be — Belgian family-name frequency (population register) | 2008 | 41 | #30,039 |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1941 | 40 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1921 | 38 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1931 | 27 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1911 | 23 | — |
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
- How do you pronounce Casu?
- A machine transcription gives /kasu/ (IPA) for Italian.
- In which country does Casu have the most bearers?
- Mondonomo estimates about 4.7 thousand people named Casu in Italy, more than in any other country we hold, where it is most often spelled casu.
- How common is the name Casu?
- In Brazil, the national register counted 178 people named Casu, about 1 in 1.2 million residents.
What do you want to know about Casu?
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/casuThe 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, “Casu”. Data snapshot 2026-10-10.