Sigfusson

Name: Sigfusson: recorded bearers, distribution and rank
Creator: Mondonomo
Published: 2026-10-10

surname · Latin script

Sigfusson is a surname written in the Latin script, with more bearers in Rwanda than in any other country.

rarermore common

ISIceland≈1 in 10K(inferred from the name graph)
RWRwanda≈1 in 19K
NONorway1 in 152K

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.

: Rwanda (inferred from the name graph)
Sources: 55 (measured from records)
: ≈1 in 10K (inferred from the name graph)

measured from records inferred from the name graph

Name dossier (print, CSV)

Spellings & scripts(measured from records)

One other spelling is counted as the same name:

Sigfússon

Locally spelled Sigfússon in IS Iceland.

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 across 5 languages in the etymology graph.

Where in the world(measured from records)

Sigfusson 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 Sigfusson is recorded, by country
Country					Most common spelling	Sources
RW Rwanda	—	≈680 est.	≈1 in 19K	—	Sigfusson	1
CA Canada	—	≈72 est.	≈1 in 524K	—	Sigfusson	42
US United States	—	≈64 est.	≈1 in 5.2M	—	Sigfusson	55
NO Norway	—	36	1 in 152K	36	Sigfusson	4
IS Iceland	#223	≈34 est.	≈1 in 10K	1	Sigfússon	43
DK Denmark	—	31	1 in 189K	31	Sigfusson	24

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: Þjóðskrá Íslands — Name frequencies (NafnTíðni, registry); Danmarks Statistik — Hvor mange hedder...? (living-population name counts); 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)

Sigfusson is also recorded as 5 other names, grouped separately because the records behind them do not connect to the one described above.

Spanish surname3 spellings in the group
Most recorded in United States
Also written Sigfússon
French surname2 spellings in the group
Most recorded in Canada
Also written Sigfússon
a separate name2 spellings in the group
Also written Sigfússon
a separate name2 spellings in the group
Also written Sigfússon
a separate name4 spellings in the group
Also written Sigfússon

10 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.

Evidence(measured from records)

Attested in 5 sources across 4 countries.

Official registers attesting Sigfusson
Country	Register	Year	Count	Rank
NO Norway	SSB — Navnesøk (name-search service, living population)	—	36	#31,658
DK Denmark	Danmarks Statistik — Hvor mange hedder...? (living-population name counts)	—	31	#16,081

Reference works 1

Wikipedia surname tokens

These works list the name; their figures are licensed and are not reproduced here.

Frequently asked questions

In which country does Sigfusson have the most bearers?: Mondonomo estimates about 676 people named Sigfusson in Rwanda, more than in any other country we hold, where it is most often spelled sigfusson.
How common is the name Sigfusson?: In Norway, the national register counted 36 people named Sigfusson, about 1 in 152 thousand residents.
How common is Sigfusson compared with other names?: In Iceland, Sigfusson is the 223rd most common surname of 9,400 surnames recorded there.

What do you want to know about Sigfusson?

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/sigfusson

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 2026-10-10 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, “Sigfusson” — the 223rd most common surname in Iceland. Data snapshot 2026-10-10.

See how Sigfusson parses inside a full name →

Spellings & scripts●(measured from records)