Ionascu
surname · Latin script
Recorded for both men and women· direction only, no split published
/ʲonasku/(machine-generated) pronunciation, model-generated
Ionascu is a surname written in the Latin script, with more bearers in Romania than in any other country.
- RORomania≈1 in 5.9K(inferred from the name graph)
- MDMoldova≈1 in 20K
- ITItaly≈1 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.
- Romania (inferred from the name graph)
- Sources
- 62 (measured from records)
- ≈1 in 5.9K (inferred from the name graph)
≈3,600 people, est.
Highest-authority source
Romania, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
Meaning & origin
No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.
Attested across 2 languages in the etymology graph.
Where in the world(measured from records)
Ionascu 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 | #434 | ≈3,600 est. | ≈1 in 5.9K | — | Ionascu | 62 |
| IT Italy | — | ≈500 est. | ≈1 in 124K | — | Ionascu | 21 |
| ES Spain | — | 181 | 1 in 276K | 181 | Ionascu | 18 |
| MD Moldova | #832 | ≈170 est. | ≈1 in 20K | — | Ionascu | 14 |
| GB United Kingdom | — | ≈57 est. | ≈1 in 1.2M | — | Ionascu | 34 |
| NO Norway | — | 26 | 1 in 210K | 26 | Ionascu | 8 |
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); SSB — Navnesøk (name-search service, living population). 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).
How to address them(machine-generated)
Evidence(measured from records)
Attested in 10 sources across 9 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| ES Spain | INE — Apellidos más frecuentes (Padrón Municipal) | — | 181 | #17,881 |
| ES Spain | INE — Padrón per-token widgets (current living counts, given + apellidos) | — | 181 | #17,805 |
| NO Norway | SSB — Navnesøk (name-search service, living population) | — | 26 | #37,214 |
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- How do you pronounce Ionascu?
- A machine transcription gives /ʲonasku/ (IPA) for Romanian.
- In which country does Ionascu have the most bearers?
- Mondonomo estimates about 3.6 thousand people named Ionascu in Romania, more than in any other country we hold, where it is most often spelled ionascu.
- How common is the name Ionascu?
- In Spain, the national register counted 181 people named Ionascu, about 1 in 276 thousand residents.
- How common is Ionascu compared with other names?
- In Romania, Ionascu is the 434th most common surname of 78,699 surnames recorded there.
What do you want to know about Ionascu?
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/ionascuThe 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, “Ionascu” — the 434th most common surname in Romania. Data snapshot 2026-10-10.