Ellefsen
surname · Latin script
Recorded for both men and women· direction only, no split published
/ɛɫɪfsən/(machine-generated) pronunciation, model-generated
Ellefsen is a surname written in the Latin script, with more bearers in Norway than in any other country.
- NONorway1 in 1.5K(measured from records)
- DKDenmark1 in 54K
- SESweden1 in 300K
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.
- Norway (measured from records)
- 2 (measured from records)
- Sources
- 4 (measured from records)
- 1 in 1.5K (inferred from the name graph)
3,562 people
recorded for this name
Reference-verified
Norway
measured from records inferred from the name graph
Spellings & scripts(measured from records)
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.
Where in the world(measured from records)
Ellefsen 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.
3,562 people counted by SSB — Navnesøk (name-search service, living population). 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: SSB — Navnesøk (name-search service, living population); Census Bureau — Surname Frequency 2010; Census Bureau — Surname Frequency 2020; Danmarks Statistik — Hvor mange hedder...? (living-population name counts); Skatteverket — Sök hur många som har ett visst namn (living population); dane.gov.pl — PESEL living persons (surnames); 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).
Notable people with this name(measured from records)
- Sámal Ellefsenb. 1886FODanish politician
- Johan Ellefsenb. 1888NONorwegian writer (1888-1921)
- Johan Ellefsenb. 1895NONorwegian architect (1895-1969)
- Bjarne Bystad Ellefsenb. 1915NONorwegian architect
- Gunnar Ellefsenb. 1930NONorwegian politician (1930–1997)
- Pauli Ellefsenb. 1936FOPrime Minister of the Faroe Islands (1936-2012)
- Harald Ellefsenb. 1950NONorwegian politician
- Per Christian Ellefsenb. 1954NONorwegian actor
- Mortiisb. 1975NOnot in their usual nameNorwegian musician
- Bernhard Ellefsenb. 1984NONorwegian literary critic
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 14 sources across 6 countries.
Reference works 3
- Wikipedia surname tokens
- Wikidata name items (native-script + romanized given/family names)
- Søndergaard, Georg, Danske efternavne (Lademann 1984/1991)
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 Ellefsen?
- A machine transcription gives /ɛɫɪfsən/ (IPA) for English.
- In which country does Ellefsen have the most bearers?
- In Norway, the national register counted about 3.6 thousand people named Ellefsen, more than in any other country we hold, where it is most often spelled ellefsen.
- Where is Ellefsen most common?
- Ellefsen is densest in Norway, where the national register counts about 1 in 1.5 thousand people carrying it.
- How common is the name Ellefsen?
- In Norway, the national register counted 3,562 people named Ellefsen, about 1 in 1.5 thousand residents.
What do you want to know about Ellefsen?
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/ellefsenThe 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, “Ellefsen”. Data snapshot 2026-10-10.