Claessens
surname · Latin script
Recorded for both men and women· direction only, no split published
Claessens is a surname written in the Latin script, with more bearers in Belgium than in any other country, where it is the 88th most common surname.
- BEBelgium1 in 2.2K(measured from records)
- NLNetherlands1 in 7.1K
- FRFrance≈1 in 255K
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.
- Belgium (measured from records)
- Sources
- 122 (measured from records)
- 1 in 2.2K (inferred from the name graph)
5,329 people, 2008
Highest-authority source
Belgium
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
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 in the world(measured from records)
Claessens 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 | ||||
|---|---|---|---|---|---|---|
| BE Belgium | #88 | 5,329 | 1 in 2.2K | 5.3K | Claessens | 106 |
| NL Netherlands | #683 | 2,418 | 1 in 7.1K | 2.4K | Claessens | 75 |
| FR France | — | ≈270 est. | ≈1 in 255K | 31 | Claessens | 122 |
| DE Germany | — | ≈170 est. | ≈1 in 462K | — | Claessens | 46 |
| US United States | — | 150 | 1 in 2.2M | 163 | Claessens | 109 |
| CH Switzerland | — | 36 | 1 in 233K | 36 | Claessens | 7 |
| LU Luxembourg | — | ≈18 est. | ≈1 in 35K | — | Claessens | 7 |
| EE Estonia | — | ≈7 est. | ≈1 in 175K | listed | — | 1 |
5,329 people counted by Familienaam.be — Belgian family-name frequency (population register), 2008. 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: Familienaam.be — Belgian family-name frequency (population register); CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007); Census Bureau — Surname Frequency 2010; Census Bureau — Surname Frequency 2020; INSEE — Fichier des noms de famille (1891–2000); 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).
Notable people with this name(measured from records)
- Adam Claessensb. 1818NLDutch Catholic archbishop
- François Claessensb. 1897BEgymnast (1897-1971)
- Albert Claessensb. 1900BEBelgian entrepreneur and politician
- Jean-Baptiste Claessensb. 1900BEBelgian artistic gymnast
- Dieter Claessensb. 1921DEGerman sociologist and anthropologist (1921–1997)
- Henri J. M. Claessenb. 1930NLnot in their usual nameDutch anthropologist (1930–2022)
- Stijn Claessensb. 1959NLeconomist
- Benny Claessensb. 1981BEBelgian actor
- Olivier Claessensb. 1988BEBelgian footballer
- Zoé Claessensb. 2001CHSwiss cyclist
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).
Evidence(measured from records)
Attested in 19 sources across 10 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BE Belgium | Familienaam.be — Belgian family-name frequency (population register) | 2008 | 5.3K | #94 |
| BE Belgium | Statbel — Noms de famille (family names) | — | 4.9K | #103 |
| NL Netherlands | CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007) | 2007 | 2.4K | #477 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 163 | #114,090 |
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 150 | #116,201 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 143 | #113,519 |
| CH Switzerland | BFS — Familiennamen der Wohnbevölkerung (surnames) | 2024 | 36 | #23,866 |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1971 | 34 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1941 | 33 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1921 | 32 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1991 | 31 | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1931 | 31 | — |
Reference works 3
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- 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
- In which country does Claessens have the most bearers?
- In Belgium, the national register counted about 5.3 thousand people named Claessens, more than in any other country we hold, where it is most often spelled claessens.
- Where is Claessens most common?
- Claessens is densest in Belgium, where the national register counts about 1 in 2.2 thousand people carrying it.
- How common is the name Claessens?
- In Belgium, the national register counted 5,329 people named Claessens in 2008, about 1 in 2.2 thousand residents.
- How common is Claessens compared with other names?
- In Belgium, Claessens is the 88th most common surname of 246,397 surnames recorded there.
What do you want to know about Claessens?
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/claessensThe 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, “Claessens” — the 88th most common surname in Belgium. Data snapshot 2026-10-10.