Willemsen

surname · Latin script

Meaning, in Dutch: alternative form of Willems, a surname originating as a patronymic

Recorded for both men and women· direction only, no split published

/ʋɪləmsən/(machine-generated) pronunciation, model-generated

Willemsen is a surname written in the Latin script, with more bearers in the Netherlands than in any other country, where it is the 94th most common surname.

rarermore common
  • NLNetherlands1 in 1.5K(measured from records)
  • USUnited States1 in 553K
  • BEBelgium1 in 15K

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.

Netherlands (measured from records)

11,230 people, 2007

Sources
153 (measured from records)

Highest-authority source

1 in 1.5K (inferred from the name graph)

Netherlands

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin(measured from records)

Patronymic from Willem/Wilhelm with -sen suffix. 676 bearers.

Sources 1

  • Deutscher Familiennamenatlas, Band 3: Morphologie der Familiennamen

Attested in 1 language in the etymology graph.

How Willemsen is read(measured from records)

Willemsen is one spelling over 3 language communities, and the dictionaries record it differently in 2 of them. Each row is what a source recorded for that language, beside the share of this name’s records the language holds. No single row is the name’s meaning.

  • Dutch40%

    alternative form of Willems, a surname originating as a patronymic

    as a wordkaikki.org Wiktionary extract (IPA + transliterations)

  • English34%

    No dictionary in our sources glosses Willemsen in English.

  • German12%

    Patronymic from Willem/Wilhelm with -sen suffix. 676 bearers.

    as a nameDeutscher Familiennamenatlas, Band 3: Morphologie der Familiennamen

    Patronymic from Willem; -s- + -en formation (type -sen).

    as a nameDeutscher Familiennamenatlas, Band 3: Morphologie der Familiennamen

    Patronymischer Familienname aus Rufnamen mit Erstglied willo/willio 'Wille' und Zweitglied helm 'Helm'.

    as a nameDeutscher Familiennamenatlas, Band 6: Familiennamen aus Rufnamen

    Patronymischer Familienname zu Wilhelm; belegt mit 659 Trägern in Deutschland. Demonstriert die Auflösung der Kompositionsfuge und die patronymische Bildung mit -sen/-s sowie Kurzformen des Rufnamens.

    as a nameDeutscher Familiennamenatlas, Band 3: Morphologie der Familiennamen

    Patronymischer Name auf -sen. Bildung aus Willem/Wilhelm mit Suffix -sen.

    as a nameDeutscher Familiennamenatlas, Band 3: Morphologie der Familiennamen

The share is ours — how much of this name’s records each language holds. The sense beside it is the source’s, quoted and credited, including where it names a gender. We do not publish a gender of our own per language: our records carry one figure for the spelling as a whole.

Where in the world(measured from records)

Willemsen 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.

Where Willemsen is recorded, by country
CountryMost common spellingSources
NL Netherlands#9411,2301 in 1.5K11KWillemsen113
BE Belgium—7991 in 15K799Willemsen51
US United States—6011 in 553K601Willemsen153
AU Australia—≈260 est.≈1 in 100K—Willemsen64
ID Indonesia—≈210 est.≈1 in 1.3M—Willemsen12
NZ New Zealand—≈33 est.≈1 in 150K—Willemsen22
NO Norway—301 in 182K30—2

11,230 people counted by CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007), 2007. 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: CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007); Census Bureau — Surname Frequency 2010; Familienaam.be — Belgian family-name frequency (population register); SSB — Navnesøk (name-search service, living population). 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 names spelled this way(inferred from the name graph)

Willemsen is also recorded as another name, grouped separately because the records behind them do not connect to the one described above.

  • a separate name2 spellings in the group

    Also written Willem-Sen

38 further groups record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Notable people with this name(measured from records)

180018501900195020002050Michaël Willemsen, b. 1831Carl Arnold Willemsen, b. 1902Madeline Willemsen, b. 1915Tineke Willemsen, b. 1946Roger Willemsen, b. 1955Olivier Willemsen, b. 1980Marco Asensio, b. 1996Mike Williams, b. 1996Tabea Willemsen, b. 2001Maas Willemsen, b. 2003

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)

FormalGeachte heer/mevrouw Willemsen,Dear Willemsen, (English)
InformalGeachte heer/mevrouw Willemsen,Hello, (English)

Evidence(measured from records)

Attested in 22 sources across 13 countries.

Official registers attesting Willemsen
CountryRegisterYearCountRank
NL NetherlandsCBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007)200711K#43
BE BelgiumFamilienaam.be — Belgian family-name frequency (population register)2008799#1,755
BE BelgiumStatbel — Noms de famille (family names)—763#1,850
US United StatesCensus Bureau — Surname Frequency 20102010601#37,125
US United StatesCensus Bureau — Surname Frequency 20002000592#35,860
US United StatesCensus Bureau — Surname Frequency 20202020541#43,067
NO NorwaySSB — Navnesøk (name-search service, living population)—30#35,152
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

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

Where does the name Willemsen come from?
Patronymic from Willem/Wilhelm with -sen suffix. 676 bearers. Recorded by Deutscher Familiennamenatlas, Band 3: Morphologie der Familiennamen.
How do you pronounce Willemsen?
A machine transcription gives /ʋɪləmsən/ (IPA) for Dutch.
What does the name Willemsen mean?
In Dutch, alternative form of Willems, a surname originating as a patronymic
In which country does Willemsen have the most bearers?
In the Netherlands, the national register counted about 11 thousand people named Willemsen, more than in any other country we hold, where it is most often spelled willemsen.
Where is Willemsen most common?
Willemsen is densest in the Netherlands, where the national register counts about 1 in 1.5 thousand people carrying it.
How common is the name Willemsen?
In the Netherlands, the national register counted 11,230 people named Willemsen in 2007, about 1 in 1.5 thousand residents.
How common is Willemsen compared with other names?
In the Netherlands, Willemsen is the 94th most common surname of 284,143 surnames recorded there.

What do you want to know about Willemsen?

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Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/willemsen

The 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, “Willemsen” — the 94th most common surname in Netherlands. Data snapshot 2026-10-10.

See how Willemsen parses inside a full name →