Deasy
surname · Latin script
Meaning: name for a member of the vassal community known as the Deis, a term of uncertain meaning and origin
Recorded as a female name· opposite-gender records fall within measured source noise
/ˈdisi/(machine-generated) pronunciation, model-generated
Deasy is a surname written in the Latin script, with more bearers in Indonesia than in any other country.
- GBUnited Kingdom≈1 in 163K(inferred from the name graph)
- USUnited States1 in 324K
- IEIreland≈1 in 11K
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.
- Indonesia (inferred from the name graph)
- Sources
- 249 (measured from records)
- ≈1 in 11K (inferred from the name graph)
≈3,500 people, est.
Highest-authority source
Ireland, est.
measured from records inferred from the name graph
Meaning & origin(measured from records)
name for a member of the vassal community known as the Deis, a term of uncertain meaning and origin. Var.: Deacy. De Cola De Bon! see Bon Debrle Erench: habitation name, with fused preposition de, from Brie in Seine-et-Marne, apparently so called from the Gaul, element briga hill (cf. Bryan). Deat see Dieudonne Var,: Debray. D’Eath see Death Debrle see Briard De Ath see Death Debrosse see Brosse
Sources 1
- The Oxford Names Companion - The definitive guide to Surnames, First Names, and Place Names of the British Isles
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Deasy 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 | ||||
|---|---|---|---|---|---|---|
| ID Indonesia | — | ≈3,500 est. | ≈1 in 77K | listed | — | 4 |
| US United States | — | 1,027 | 1 in 324K | 1K | Deasy | 249 |
| IE Ireland | #834 | ≈460 est. | ≈1 in 11K | — | Deasy | 76 |
| GB United Kingdom | — | ≈400 est. | ≈1 in 163K | listed | Deasy | 101 |
| DZ Algeria | — | ≈200 est. | ≈1 in 217K | — | Deasy | 1 |
| AU Australia | — | ≈170 est. | ≈1 in 149K | — | Deasy | 52 |
| CU Cuba | — | ≈100 est. | ≈1 in 110K | — | Deasy | 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; the hanks-dictionary-surnames-1988 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).
Other recorded senses(measured from records)
Deasy is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Irish, Déiseach (i.e. of the Decies, Co. Waterford). Now mainly found in Co. Cork. Woulfe says it is found in Co. Sligo as Mac an Déisigh : I have no evidence of that. MIF
as a nameThe Surnames of Ireland
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name(measured from records)
- Rickard Deasyb. 1812GBBritish politician (1812–1883)
- Timothy Deasyb. 1839IEIrish republican (1839-1880)
- Henry Hugh Peter Deasyb. 1866GBBritish Army officer and businessman (1866-1947)
- Austin Deasyb. 1936IEIrish politician (1936-2017)
- Mike Deasyb. 1941USAmerican singer, songwriter, singer-songwriter, saxophonist and jazz musician
- Frank Deasyb. 1959IEIrish screenwriter (1959-2009)
- Dan Deasyb. 1966USAmerican politician
- Bill Deasyb. 1966USAmerican musician
- Tim Deasyb. 1985GBFootballer (born 1985)
- Seamus Deasycinematographer
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)
Attested in 16 sources across 10 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 1K | #24,388 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 1K | #25,728 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 997 | #23,698 |
| GB United Kingdom | A Dictionary of Surnames (Hanks & Hodges, 1988) | — | — | — |
| US United States | wru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.) | — | — | — |
Reference works 2
- Wikipedia surname tokens
- 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
- Where does the name Deasy come from?
- name for a member of the vassal community known as the Deis, a term of uncertain meaning and origin. Var.: Deacy. Recorded by The Oxford Names Companion - The definitive guide to Surnames, First Names, and Place Names of the British Isles.
- How do you pronounce Deasy?
- A machine transcription gives /ˈdisi/ (IPA) for English.
- What does the name Deasy mean?
- Recorded meaning: name for a member of the vassal community known as the Deis, a term of uncertain meaning and origin.
- In which country does Deasy have the most bearers?
- Mondonomo estimates about 3.5 thousand people named Deasy in Indonesia, more than in any other country we hold.
- How common is the name Deasy?
- In the United States, the national register counted 1,027 people named Deasy in 2010, about 1 in 324 thousand residents.
- How common is Deasy compared with other names?
- In Ireland, Deasy is the 834th most common surname of 73,729 surnames recorded there.
What do you want to know about Deasy?
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/deasyThe 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, “Deasy” — the 834th most common surname in Ireland. Data snapshot 2026-10-10.