Käro

surname · Latin script

(measured from records)Officially recorded in 1 country

Käro is a surname written in the Latin script, with more bearers in the United States than in any other country. Recorded meaning: nickname from Spanish caro ‘dear’. The surname is recorded in Toledo, Spain, in the 14th century. The Ashkenazic branch is ultimately of Sephardic origin.

  • SISlovenia1 in 15K(measured from records)
  • FIFinland1 in 38K
  • SESweden1 in 134K

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.

United States (measured from records)

393 people, 2010

Record sources
28 (measured from records)

corpus datasets behind its best-documented spelling

strongest: highest-authority source

1 in 15K (inferred from the name graph)

Slovenia

measured from records inferred from the name graph

Meaning & origin

(measured from records)

nickname from Spanish caro ‘dear’. The surname is recorded in Toledo, Spain, in the 14th century. The Ashkenazic branch is ultimately of Sephardic origin.

Cited for this meaning 3

  • Dictionary of American Family Names
  • Dicionario Sefaradi De SobrenomesDictionary Of Sephardic Surnames Inclusive Cristaos-Novos, Conversos, Marranos, Italianos,…
  • Nordic Names

Attested across 22 languages in the etymology graph.

Where in the world

(measured from records)

Käro 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 Käro is recorded, by country
CountryMost common spellingSources
US United States3931 in 846K431—14
FI Finland1461 in 38K399—28
SI Slovenia1441 in 15K144—1
SE Sweden761 in 134K76—5
AR Argentina481 in 947K48——
EE Estonia≈27 est.≈1 in 51K8Käro9
NO Norway201 in 273K66——

393 people counted by Census Bureau — Surname Frequency 2010, 2010. 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 2020; DVV — Nimipalvelu (Finnish name service, per-name lookup); stat.si Imena rojstva — full name register (per-token frequency + rank); Skatteverket — Sök hur många som har ett visst namn (living population); SSB — Navnesøk (name-search service, living population); RENAPER — Apellidos (person counts, national); 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 names spelled this way

(inferred from the name graph)

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

  • English surname18 spellings in the group

    Most recorded in United States, Netherlands

    Languages: English, Dutch

    Also written Karoe, Karo, Karó, Kärö, Karö

2 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)

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).

Evidence

(measured from records)

3 registers and reference works attest this spelling, across 1 country.

Official registers attesting Käro
CountryRegisterYearCountRank
EE EstoniaStatistics Estonia — per-name Population Register counts (nimed)—29#3,769
EE EstoniaStatistics Estonia — per-name Population Register counts (nimed)—17#6,521

Reference works 1

  • 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

What does the name Käro mean, and where does it come from?
nickname from Spanish caro ‘dear’. The surname is recorded in Toledo, Spain, in the 14th century. The Ashkenazic branch is ultimately of Sephardic origin. Recorded by Dictionary of American Family Names and Dicionario Sefaradi De SobrenomesDictionary Of Sephardic Surnames Inclusive Cristaos-Novos, Conversos, Marranos, Italianos,… and 1 other source.
In which country does Käro have the most bearers?
In the United States, the national register counted about 393 people named Käro, more than in any other country we hold.
Where is Käro most common?
Measured as a share of residents rather than as a count, Käro is densest in Slovenia — about 1 in 15 thousand people — even though United States holds more of our records for it.
How common is the name Käro?
In the United States, the national register counted 393 people named Käro in 2010, about 1 in 846 thousand residents.

What do you want to know about Käro?

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Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/k%C3%A4ro

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, “Käro”. Data snapshot 2026-10-13.

See how Käro parses inside a full name →