Klasen
surname · Latin script
Meaning: Patronymischer Familienname zu Nikolaus; schwacher Genitiv bzw
(measured from records)Officially recorded in 12 countries · latest register: BFS, 2024
/ˈkɫeɪsən/(machine-generated) pronunciation, model-generated
Klasen is a surname written in the Latin script, with more bearers in Germany than in any other country.
- DEGermany≈1 in 25K(inferred from the name graph)
- USUnited States1 in 697K
- NLNetherlands1 in 34K
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.
- Germany (inferred from the name graph)
- Record sources
- 138 (measured from records)
- ≈1 in 25K (inferred from the name graph)
≈3,200 people, est.
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Germany, est.
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
(measured from records)Patronymischer Familienname zu Nikolaus; schwacher Genitiv bzw. -sen-Form. 1341 Belege.
Cited for this meaning 1
- Deutscher Familiennamenatlas, Band 3: Morphologie der Familiennamen
Where in the world
(measured from records)Klasen 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 | |||
|---|---|---|---|---|---|
| DE Germany | ≈3,200 est. | ≈1 in 25K | — | Klasen | 104 |
| NL Netherlands | 511 | 1 in 34K | 511 | Klasen | 34 |
| US United States | 477 | 1 in 697K | 493 | Klasen | 138 |
| BR Brazil | 187 | 1 in 1.1M | 187 | — | — |
| ZA South Africa | ≈180 est. | ≈1 in 324K | — | Klasen | 7 |
| CH Switzerland | 41 | 1 in 205K | 41 | Klasen | 9 |
| DK Denmark | ≈22 est. | ≈1 in 265K | — | Klasen | 6 |
| EE Estonia | ≈14 est. | ≈1 in 88K | 12 | — | 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; Census Bureau — Surname Frequency 2000; CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007); IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); BFS — Familiennamen der Wohnbevölkerung (surnames); Statistics Estonia — per-name Population Register counts (nimed). 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)Klasen 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 German, genitive of Klas, from Nikolaus
as a nameDeutsche Namenkunde: Unsere Familiennamen nach ihrer Entstehung und Bedeutung
In Norwegian Nynorsk, definite singular of klase
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
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)- Ludwig Klasenb. 1839DEGerman architect
- Karl Klasenb. 1909DEPresident of the Bundesbank (1909–1991)
- Peter Klasenb. 1935DEGerman sculptor, photographer and painter (born 1935)
- Sepp Klasenb. 1935DEGerman politician (1935–2023)
- Odilo Klasenb. 1959DEGerman composer
- Stephan Klasenb. 1966DEeconomist (Georg-August-Universität Göttingen; ifo Institut - Leibniz-Institut für Wirtschaftsforschung an der Universität München e.V.; Institute of Labor Economics (IZA))
- Arno Klasenb. 1967DEGerman racing driver
- Thomas Klasenb. 1983DEGerman footballer
- Linus Klasenb. 1986SESwedish ice hockey player
- Jacqueline Klasenb. 1994DEGerman association football 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)22 registers and reference works attest this spelling, across 12 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| NL Netherlands | CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007) | 2007 | 511 | #3,794 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 493 | #41,596 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 484 | #47,272 |
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 477 | #44,957 |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 187 | #38,819 |
| CH Switzerland | BFS — Familiennamen der Wohnbevölkerung (surnames) | 2024 | 41 | #21,670 |
| EE Estonia | Statistics Estonia — per-name Population Register counts (nimed) | — | 12 | #9,351 |
| EE Estonia | Statistics Estonia — per-name Population Register counts (nimed) | — | 10 | #10,572 |
| US United States | wru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.) | — | — | — |
Reference works 5
- 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)
- Rymut, Słownik nazwisk współcześnie w Polsce używanych (10 vols, IJP PAN, Kraków 1992–1994) — every Polish surname in the PESEL register at the end of 1990, with bearer counts nationally and per voivodeship1990
- Hoffman, Polish Surnames: Origins and Meanings (2nd ed., 2012)
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
- How do you pronounce Klasen?
- A machine transcription gives /ˈkɫeɪsən/ (IPA) for English.
- What does the name Klasen mean?
- Recorded meaning: Patronymischer Familienname zu Nikolaus; schwacher Genitiv bzw.
- In which country does Klasen have the most bearers?
- Mondonomo estimates about 3.2 thousand people named Klasen in Germany, more than in any other country we hold, where it is most often spelled klasen.
- How common is the name Klasen?
- In the Netherlands, the national register counted 511 people named Klasen in 2007, about 1 in 34 thousand residents.
What do you want to know about Klasen?
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/klasenThe 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, “Klasen”. Data snapshot 2026-10-13.