Tollefsen
surname · Latin script
(measured from records)Officially recorded in 10 countries · latest register: SSB PxWebApi, 2025
Tollefsen is a surname written in the Latin script, with more bearers in Norway than in any other country.
- NONorway1 in 1.2K(measured from records)
- SESweden1 in 128K
- USUnited States1 in 830K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Countries with no figure are shown too: flat where a national register lists the name without counting it, hatched where only our records hold it. One hue, darker where it is more common; hover a country for its figure.
- Norway (measured from records)
- Record sources
- 109 (measured from records)
- 1 in 1.2K (inferred from the name graph)
4,406 people
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Norway
measured from records inferred from the name graph
Meaning & origin
No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.
Where the surname Tollefsen is found
(measured from records)Tollefsen 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 | ||||
|---|---|---|---|---|---|---|
| NO Norway | #189 | 4,406 | 1 in 1.2K | 4.4K | Tollefsen | 88 |
| US United States | — | 401 | 1 in 830K | 409 | Tollefsen | 109 |
| SE Sweden | — | 80 | 1 in 128K | 80 | Tollefsen | 11 |
| GH Ghana | — | ≈76 est. | ≈1 in 451K | — | Tollefsen | 4 |
| CA Canada | — | ≈72 est. | ≈1 in 574K | — | Tollefsen | 13 |
4,406 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; Skatteverket — Sök hur många som har ett visst namn (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).
Notable people with this name
(measured from records)- Tollef Tollefsenb. 1885NONorwegian rower (1885–1963)
- Astrid Tollefsenb. 1897NONorwegian lyricist (1897–1973)
- Ole-Kristian Tollefsenb. 1984NOice hockey 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)18 registers and reference works attest this spelling, across 10 countries.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- Which countries have the most people with the surname Tollefsen?
- In Norway, the national register counted about 4.4 thousand people named Tollefsen, more than in any other country we hold, where it is most often spelled tollefsen. After it come United States, Sweden, Ghana and Canada; the country table on this page ranks them.
- Where is Tollefsen most common?
- Tollefsen is densest in Norway, where the national register counts about 1 in 1.2 thousand people carrying it.
- How common is the name Tollefsen?
- In Norway, the national register counted 4,406 people named Tollefsen, about 1 in 1.2 thousand residents.
- How common is Tollefsen compared with other names?
- In Norway, Tollefsen is the 189th most common surname of 90,139 surnames recorded there.
What do you want to know about Tollefsen?
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/tollefsenThe 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, “Tollefsen” — the 189th most common surname in Norway. Data snapshot 2026-10-13.