Ruï
given name · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Ruï is a given name written in the Latin script, with more bearers in China than in any other country. In Portugal it is the 11th most common given name.
- PTPortugal≈1 in 99(inferred from the name graph)
- AOAngola≈1 in 1.2K
- CNChina≈1 in 2K
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.
- China (inferred from the name graph)
- 3 (measured from records)
- Sources
- 273 (measured from records)
- ≈1 in 99 (inferred from the name graph)
≈710,000 people, est.
recorded for this name
Highest-authority source
Portugal, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Locally spelled Rui in PT Portugal, BR Brazil, US United States and 4 more.
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(measured from records)
do latim arrugia; indica morador junto a arroio, rio ou córrego
Sources 5
- Diccionario etimológico de nombres propios
- Dicionário dos sobrenomes italianos
- Wiktionary
- Nordic Names
- Schuessler, ABC Etymological Dictionary of Old Chinese (2007)
Attested across 26 languages in the etymology graph.
Where in the world(measured from records)
Ruï 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 | ||||
|---|---|---|---|---|---|---|
| CN China | — | ≈710,000 est. | ≈1 in 2K | — | Rui | 153 |
| PT Portugal | #11 | ≈100,000 est. | ≈1 in 99 | listed | Rui | 230 |
| BR Brazil | #696 | 29,481 | 1 in 7.2K | 38K | Rui | 168 |
| AO Angola | #30 | ≈26,000 est. | ≈1 in 1.2K | 2 | Rui | 60 |
| US United States | — | 7,036 | 1 in 47K | 4.1K | Rui | 273 |
| MY Malaysia | — | ≈4,600 est. | ≈1 in 7.1K | — | Rui | 44 |
| CH Switzerland | #424 | ≈2,400 est. | ≈1 in 3.5K | 68 | Rui | 73 |
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: IBGE — names by decade (Kaggle mirror); IBGE — Nomes (census name API); Census Bureau — First Name Frequency 2020 by sex; Wikidata humans by citizenship — given & family names; BFS — Familiennamen der Wohnbevölkerung (surnames). 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).
Evidence(measured from records)
No register attests this spelling yet
Frequently asked questions
- Is Ruï a male or female name?
- Ruï is a male name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
- In which country does Ruï have the most bearers?
- Mondonomo estimates about 713 thousand people named Ruï in China, more than in any other country we hold, where it is most often spelled rui.
- How common is the name Ruï?
- In Brazil, the national register counted 29,481 people named Ruï in 2022, about 1 in 7.2 thousand residents.
- How common is Ruï compared with other names?
- In Portugal, Ruï is the 11th most common given name of 19,352 given names recorded there.
What do you want to know about Ruï?
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/ru%C3%AFThe 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, “Ruï” — the 11th most common given name in Portugal. Data snapshot 2026-10-10.