Claeßens
surname · Latin script
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 2.2Kas Claessens(measured from records)
- NLNetherlands1 in 7.1Kas Claessens
- FRFrance≈1 in 255Kas Claessens
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Claeßens itself, the figure is that spelling’s, and it is named. 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 named Claessens, 2008
Highest-authority source
Belgium, as Claessens
measured from records inferred from the name graph
Spellings & scripts(measured from records)
Locally spelled Claessens in BE Belgium, NL Netherlands, 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
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 | 5,329as Claessens | 1 in 2.2K | 5.3K | Claessens | 106 |
| NL Netherlands | #683 | 2,418as Claessens | 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 | — | 150as Claessens | 1 in 2.2M | 163 | Claessens | 109 |
| CH Switzerland | — | 36as Claessens | 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).
Evidence(measured from records)
Attested in 1 sources across 0 countries.
Reference works 1
- 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 is Claeßens most common?
- No national register we hold counts the spelling Claeßens itself. The densest figure for its family of spellings is Belgium's: the national register counts about 1 in 2.2 thousand people named Claessens.
- 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/clae%C3%9FensThe 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.