Oproiu
surname · Latin script
Recorded for both men and women· direction only, no split published
Oproiu is a surname written in the Latin script, with more bearers in Romania than in any other country. Recorded meaning: a surname originating as a patronymic.
- RORomania≈1 in 16K(inferred from the name graph)
- EEEstonia≈1 in 701K
- ESSpain1 in 725K
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.
- Romania (inferred from the name graph)
- Sources
- 43 (measured from records)
- ≈1 in 16K (inferred from the name graph)
≈1,300 people, est.
Highest-authority source
Romania, est.
measured from records inferred from the name graph
Meaning & origin(measured from records)
a surname originating as a patronymic
Sources 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Oproiu 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 | ||||
|---|---|---|---|---|---|---|
| RO Romania | #938 | ≈1,300 est. | ≈1 in 16K | — | Oproiu | 43 |
| ES Spain | — | 69 | 1 in 725K | 69 | Oproiu | 11 |
| IT Italy | — | ≈64 est. | ≈1 in 973K | — | Oproiu | 3 |
| PL Poland | — | 12 | 1 in 3.2M | 8 | — | — |
| GB United Kingdom | — | ≈10 est. | ≈1 in 6.6M | — | Oproiu | 19 |
| BE Belgium | — | 8 | 1 in 1.5M | 8 | Oproiu | 4 |
| EE Estonia | — | ≈2 est. | ≈1 in 701K | listed | — | — |
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: INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); Familienaam.be — Belgian family-name frequency (population register); dane.gov.pl — PESEL living persons (surnames); the ee-siseministeerium-registry 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).
Notable people with this name(measured from records)
- Ecaterina Oproiub. 1929RORomanian writer
- Alexandru Oproiub. 1930RORomanian gastroenterologist
- Tiberiu Oproiub. 1939ROPh.D. Babeş-Bolyai University 1975
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 8 sources across 4 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| EE Estonia | Siseministeerium — population register name list 2023 | 2023 | — | — |
Reference works 2
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- 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 Oproiu mean, and where does it come from?
- a surname originating as a patronymic Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- In which country does Oproiu have the most bearers?
- Mondonomo estimates about 1.3 thousand people named Oproiu in Romania, more than in any other country we hold, where it is most often spelled oproiu.
- How common is the name Oproiu?
- In Spain, the national register counted 69 people named Oproiu, about 1 in 725 thousand residents.
- How common is Oproiu compared with other names?
- In Romania, Oproiu is the 938th most common surname of 78,699 surnames recorded there.
What do you want to know about Oproiu?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/oproiuThe same payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. Rate-limited for casual use; a free API key gives 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, “Oproiu” — the 938th most common surname in Romania. Data snapshot 2026-10-10.