Lacasse
surname · Latin script
Meaning: topographic name from la casse ‘the oak’ (a word of Gaulish origin)
Recorded as a female name· opposite-gender records fall within measured source noise
/ɫɑˈkɑsi/(machine-generated) pronunciation, model-generated
Lacasse is a surname written in the Latin script, with more bearers in the United States than in any other country.
- USUnited States1 in 101K(measured from records)
- BEBelgium1 in 51K
carrying the name, as counted by each country's national register. One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- Sources
- 151 (measured from records)
- 1 in 51K (inferred from the name graph)
3,307 people, 2010
Highest-authority source
Belgium
measured from records inferred from the name graph
Meaning & origin(measured from records)
topographic name from la casse ‘the oak’ (a word of Gaulish origin).
Sources 1
- Dictionary of American Family Names
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Lacasse 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.
3,307 people counted by Census Bureau — Surname Frequency 2010, 2010. 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; INSEE — Fichier des noms de famille (1891–2000); Familienaam.be — Belgian family-name frequency (population 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)
Lacasse is also recorded in 2 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In French, metonymic occupational name for box maker, la casse ‘the box’.
as a nameDictionary of American Family Names
In French, Altération de Cassé, nom d’une localité en Sarthe.
as a nameDictionnaire des noms de famille du Canada français. Anthroponymie et généalogie. 2e édition
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)
- Gustave Lacasseb. 1890CACanadian politician (1890-1953)
- Joseph Lacasseb. 1894BEBelgian painter (1894-1975)
- Suzanne Lacasseb. 1948CACanadian scientist and civil engineer
- Josée Lacasseb. 1965CACanadian alpine skier
- Josée Lacasseb. 1970CACanadian female rugby union player
- Florent Lacasseb. 1981FRFrench athlete
- Marie-Ève Lacasseb. 1982CAFrench writer
- Ryan LaCasseb. 1983USAmerican football defensive end (born 1983)
- Geneviève Lacasseb. 1989CACanadian ice hockey player
- Cloé Lacasseb. 1993CACanadian soccer player
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 11 sources across 3 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 3.3K | #9,790 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 3.2K | #9,738 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 3.1K | #9,557 |
| BE Belgium | Familienaam.be — Belgian family-name frequency (population register) | 2008 | 231 | #7,282 |
| BE Belgium | Statbel — Noms de famille (family names) | — | 220 | #8,116 |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1941 | 39 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1951 | 32 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1971 | 27 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1911 | 27 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1901 | 27 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1981 | 23 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1961 | 21 | — |
Reference works 4
- Dictionary of American Family Names
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- Wikidata name items (native-script + romanized given/family names)
- jeantosti.com — Dictionnaire des noms de famille de France et d'ailleurs (Jean Tosti)
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
- What does the name Lacasse mean, and where does it come from?
- topographic name from la casse ‘the oak’ (a word of Gaulish origin). Recorded by Dictionary of American Family Names.
- How do you pronounce Lacasse?
- A machine transcription gives /ɫɑˈkɑsi/ (IPA) for English.
- In which country does Lacasse have the most bearers?
- In the United States, the national register counted about 3.3 thousand people named Lacasse, more than in any other country we hold, where it is most often spelled lacasse.
- Where is Lacasse most common?
- Measured as a share of residents rather than as a count, Lacasse is densest in Belgium — about 1 in 51 thousand people — even though United States holds more of our records for it.
- How common is the name Lacasse?
- In the United States, the national register counted 3,307 people named Lacasse in 2010, about 1 in 101 thousand residents.
What do you want to know about Lacasse?
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/lacasseThe 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, “Lacasse”. Data snapshot 2026-10-10.