Louisy
surname · Latin script
(measured from records)Officially recorded in 8 countries · latest register: St Kitts & Nevis, 2026
Louisy is a surname written in the Latin script, with more bearers in France than in any other country.
- DMDominica1 in 1.9K(measured from records)
- KNSt. Kitts & Nevis1 in 27K
- GYGuyana1 in 94K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Countries with no figure are shown too: flat where a national register lists the name without counting it, hatched where only our records hold it. One hue, darker where it is more common; hover a country for its figure.
- France (inferred from the name graph)
- Record sources
- 151 (measured from records)
- 1 in 1.9K (inferred from the name graph)
≈460 people, est.
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Dominica
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 the surname Louisy is found
(measured from records)Louisy 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 | |||
|---|---|---|---|---|---|
| FR France | ≈460 est. | ≈1 in 149K | 73 | Louisy | 151 |
| US United States | ≈110 est. | ≈1 in 3.1M | listed | Louisy | 98 |
| BR Brazil | ≈93 est. | ≈1 in 2.3M | 278 | — | — |
| GB United Kingdom | ≈66 est. | ≈1 in 1M | — | Louisy | 47 |
| DM Dominica | 40 | 1 in 1.9K | 40 | — | 1 |
| GY Guyana | 8 | 1 in 94K | 8 | Louisy | 1 |
| KN St. Kitts & Nevis | 2 | 1 in 27K | 2 | — | 2 |
| BB Barbados | ≈1 est. | ≈1 in 207K | — | Louisy | 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: INSEE — Fichier des noms de famille (1891–2000); the us-wru-surnames-voterfile register; IBGE — names by decade (Kaggle mirror); Dominica — Revised List of Electors May 2025; Guyana — Official List of Electors July 2025; St Kitts & Nevis — Register of Electors 2026. 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)- Allan Louisyb. 1916LCprime minister of Saint Lucia (1916-2011)
- François Louisyb. 1921FRGuadeloupean politician
- Pearlette Louisyb. 1946LCGovernor-General of Saint Lucia
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)13 registers and reference works attest this spelling, across 8 countries.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- Which countries have the most people with the surname Louisy?
- Mondonomo estimates about 461 people named Louisy in France, more than in any other country we hold, where it is most often spelled louisy. After it come United States, Brazil, United Kingdom and Dominica; the country table on this page ranks them.
- Where is Louisy most common?
- Measured as a share of residents rather than as a count, Louisy is densest in Dominica — about 1 in 1.9 thousand people — even though France holds more of our records for it.
- How common is the name Louisy?
- In Dominica, the national register counted 40 people named Louisy in 2025, about 1 in 1.9 thousand residents.
What do you want to know about Louisy?
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/louisyThe 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, “Louisy”. Data snapshot 2026-10-13.