Janousek

surname · Latin script

Meaning: from a pet form of Jan, Czech form of John

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

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

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

rarermore common
  • CZCzechia1 in 2.8K(measured from records)
  • JOJordan≈1 in 24K
  • SKSlovakia1 in 75K

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.

Czechia (measured from records)

3,764 people

Sources
80 (measured from records)

Highest-authority source

1 in 2.8K (inferred from the name graph)

Czechia

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:

Locally spelled Janoušek in CZ Czechia, SK Slovakia.

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(measured from records)

from a pet form of Jan, Czech form of John.

Sources 1

  • Dictionary of American Family Names

Attested across 11 languages in the etymology graph.

Where in the world(measured from records)

Janousek 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 Janousek is recorded, by country
CountryMost common spellingSources
CZ Czechia#2343,7641 in 2.8K3.8KJanoušek62
US United States—9161 in 363K916Janousek80
JO Jordan—≈440 est.≈1 in 24K—Janousek1
EG Egypt—≈170 est.≈1 in 606K—Janousek1
GB United Kingdom—≈86 est.≈1 in 767K—Janousek11
CA Canada—≈82 est.≈1 in 462K—Janousek6
SK Slovakia—731 in 75K73Janoušek9

3,764 people counted by MVČR — living population register 2017. 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: MVČR — living population register 2017; Census Bureau — Surname Frequency 2010; JÚĽŠ SAV — Databáza priezvisk na Slovensku (surname database, 1995 census). 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)

Janousek is also recorded as 7 other names, grouped separately because the records behind them do not connect to the one described above.

  • English surname6 spellings in the group

    Most recorded in United States, United Kingdom, Germany, Canada

    Languages: English, German, Dutch

    Also written Janoušek, Ĵanouṩek

  • French surname2 spellings in the group

    Most recorded in France, United States, Niger

    Also written Janoušek

  • a separate name3 spellings in the group

    Also written Janouśek, Janoušek

  • Hindi surname4 spellings in the group

    Most recorded in United States

    Also written Janoušek

  • Polish surname2 spellings in the group

    Most recorded in United States, Poland

    Also written Janoušek

  • Swahili surname2 spellings in the group

    Most recorded in United States

    Also written Janoušek

  • Danish surname6 spellings in the group

    Most recorded in United States

    Also written Janoušek

31 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).

How to address them(machine-generated)

FormalDear Janousek,
InformalHello,

Evidence(measured from records)

Attested in 10 sources across 4 countries.

Official registers attesting Janousek
CountryRegisterYearCountRank
US United StatesCensus Bureau — Surname Frequency 20102010916#26,598
US United StatesCensus Bureau — Surname Frequency 20202020908#28,009
US United StatesCensus Bureau — Surname Frequency 20002000905#25,610
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

Reference works 3

  • Dictionary of American Family Names
  • Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
  • 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 Janousek mean, and where does it come from?
from a pet form of Jan, Czech form of John. Recorded by Dictionary of American Family Names.
How do you pronounce Janousek?
A machine transcription gives /jəˈnusɛk/ (IPA) for English.
In which country does Janousek have the most bearers?
In Czechia, the national register counted about 3.8 thousand people named Janousek, more than in any other country we hold, where it is most often spelled janoušek.
Where is Janousek most common?
Janousek is densest in Czechia, where the national register counts about 1 in 2.8 thousand people carrying it.
How common is the name Janousek?
In Czechia, the national register counted 3,764 people named Janousek, about 1 in 2.8 thousand residents.
How common is Janousek compared with other names?
In Czechia, Janousek is the 234th most common surname of 114,573 surnames recorded there.

What do you want to know about Janousek?

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

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, “Janousek” — the 234th most common surname in Czechia. Data snapshot 2026-10-10.

See how Janousek parses inside a full name →