Joannou
surname · Latin script
(measured from records)Officially recorded in 2 countries · latest register: Census Bureau, 2020
Joannou is a surname written in the Latin script, with more bearers in Greece than in any other country. In Cyprus it is the most common surname.
- ZASouth Africa≈1 in 180Kfew records(inferred from the name graph)
- CYCyprus≈1 in 310as Ioannou
- GRGreece≈1 in 1.4Kas Ioannou
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Joannou itself, the figure is that spelling’s, and it is named. One hue, darker where it is more common; hover a country for its figure.
- Greece (inferred from the name graph)
- 2 (measured from records)
- Record sources
- 170 (measured from records)
- ≈1 in 177K (inferred from the name graph)
≈7,600 named Ioannou, est.
recorded for this name
corpus datasets behind its best-documented spelling
strongest: highest-authority source
South Africa, est.
measured from records inferred from the name graph
Spellings & scripts
(measured from records)Locally spelled Ioannou in US United States, GB United Kingdom, CY Cyprus and 1 more and Ιωαννου in GR Greece.
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 in 1 language in the etymology graph.
Where the surname Joannou is found
(measured from records)Joannou 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 | ||||
|---|---|---|---|---|---|---|
| GR Greece | #244 | ≈7,600 est. | ≈1 in 1.4K | 54 | Ιωαννου | 106 |
| CY Cyprus | #1 | ≈4,500 est. | ≈1 in 305 | — | Ioannou | 127 |
| GB United Kingdom | — | ≈950 est. | ≈1 in 73K | — | Ioannou | 133 |
| AU Australia | — | ≈550 est. | ≈1 in 49K | — | Ioannou | 114 |
| US United States | — | 522as Ioannou | 1 in 637K | 577 | Ioannou | 170 |
| ZA South Africa | — | ≈360 est. | ≈1 in 177K | — | Joannou | 20 |
| FI Finland | — | 47as Ioannou | 1 in 119K | 47 | — | 3 |
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; Census Bureau — Surname Frequency 2020; Διαύγεια — directory of signing officials (organization → signers); DVV — Nimipalvelu (Finnish name service, per-name lookup). 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)- Dakis Joannoub. 1939CYGreek entrepreneur and art collector
- Marios Joannou Eliab. 1978CYCypriot composer, academic and arts administrator
- Nikolas Ioannoub. 1995CYCypriot professional footballer
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)7 registers and reference works attest this spelling, across 2 countries.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- Which countries have the most people with the surname Joannou?
- Mondonomo estimates about 7.6 thousand people named Ioannou in Greece, more than in any other country we hold. After it come Cyprus, United Kingdom, Australia and United States; the country table on this page ranks them.
- How common is the name Joannou?
- In the United States, the national register counted 522 people named Ioannou in 2010, about 1 in 637 thousand residents.
- How common is Joannou compared with other names?
- In Greece, Joannou is the 244th most common surname of 112,415 surnames recorded there.
What do you want to know about Joannou?
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/joannouThe 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, “Joannou” — the 244th most common surname in Greece. Data snapshot 2026-10-13.