Ondrej

given name · Latin script

Recorded as a male name· opposite-gender records fall within measured source noise

Ondrej is a given name written in the Latin script, with more bearers in Czechia than in any other country, where it is the 32nd most common given name.

rarermore common
  • CZCzechia1 in 70(measured from records)
  • SKSlovakia≈1 in 900
  • GBUnited Kingdom≈1 in 181K

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)

152,450 people

2 (measured from records)

recorded for this name

Sources
184 (measured from records)

Highest-authority source

1 in 70 (inferred from the name graph)

Czechia

measured from records inferred from the name graph

Name dossier (print, CSV)

Spellings & scripts(measured from records)

OndrejLatin(measured from records)
ออนเดรThai(measured from records)

One other spelling is counted as the same name:

Locally spelled Ondřej in CZ Czechia.

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 18 languages in the etymology graph.

Where in the world(measured from records)

Ondrej 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 Ondrej is recorded, by country
CountryMost common spellingSources
CZ Czechia#32152,4501 in 70152KOndřej184
SK Slovakia#54≈6,000 est.≈1 in 9005Ondrej135
CN China—≈1,700 est.≈1 in 830K—Ondrej3
DE Germany—≈540 est.≈1 in 149K—Ondrej73
GB United Kingdom—≈360 est.≈1 in 181KlistedOndrej83
RS Serbia—≈190 est.≈1 in 36K—Ondrej14
CY Cyprus—≈48 est.≈1 in 27K—Ondrej5
IS Iceland—311 in 11K31——

152,450 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; JÚĽŠ SAV — Databáza priezvisk na Slovensku (surname database, 1995 census); the gb-nisra-baby-names-ni register; Þjóðskrá Íslands — Name frequencies (NafnTíðni, registry). 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)

Ondrej is also recorded as 4 other names, grouped separately because the records behind them do not connect to the one described above.

  • Estonian name4 spellings in the group

    Also written Ondřej

  • a separate name3 spellings in the group

    Also written Ondřej, Ondr̆ej

  • Croatian given name13 spellings in the group

    Most recorded in Croatia, Serbia, Bulgaria, United Kingdom

    Languages: Croatian, Serbian, Bulgarian

    Also written Ondřej, Ондреј

  • Russian given name18 spellings in the group

    Most recorded in Russia, Ukraine, Türkiye, Kazakhstan

    Languages: Russian, Ukrainian

    Also written Ондрей, Ондржей, Ondrei, Ondřej, Ондреи

33 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.

Other recorded senses(measured from records)

Ondrej is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.

  • Czech form of ANDREW . Pet forms: Ondra, Ondr jek, Ondr´ ek, Ondrou ek .

    as a word

Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.

Notable people with this name(measured from records)

1940196019802000Ondrej Lenárd, b. 1942Ondrej Šulaj, b. 1949Ondrej Nepela, b. 1951Ondrej Rigo, b. 1955Ondrej Krištofík, b. 1966Ondrej Dostál, b. 1971Arcibiskup Rastislav, b. 1978Ondrej Kovaľ, b. 1979Ondrej Duda, b. 1994Ondřej Sehnal, b. 1997

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)

Attested in 31 sources across 19 countries.

Official registers attesting Ondrej
CountryRegisterYearCountRank
CZ CzechiaMVČR — living population register 2017—2.8K#328
CZ Czechianaše jména — 2016 MVČR snapshot—1.4K#369
CZ CzechiaKdeJsme.cz — četnost jmen a příjmení (MVČR population register front-end)—1.4K#366
IS IcelandÞjóðskrá Íslands — Name frequencies (NafnTíðni, registry)202631—
GB United KingdomNISRA — Baby names Northern Ireland full list (1997–present)2022——

Reference works 3

  • Dictionary of American Family Names
  • Wikipedia given-name tokens
  • 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 are other forms of the name Ondrej?
In the etymology graph, Andrew, Andres and Andre are forms of the same name in other languages.
Is Ondrej a male or female name?
Ondrej is a male name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
In which country does Ondrej have the most bearers?
In Czechia, the national register counted about 152 thousand people named Ondrej, more than in any other country we hold, where it is most often spelled ondřej.
Where is Ondrej most common?
Ondrej is densest in Czechia, where the national register counts about 1 in 70 people carrying it.
How common is the name Ondrej?
In Czechia, the national register counted 152,450 people named Ondrej, about 1 in 70 residents.
How common is Ondrej compared with other names?
In Czechia, Ondrej is the 32nd most common given name of 16,679 given names recorded there.

What do you want to know about Ondrej?

Nobody replies to these one by one, but what readers ask decides what these pages answer next.

Please leave out anyone's personal details (see Privacy).

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

The same 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), and bulk access is licensed separately.

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, “Ondrej” — the 32nd most common given name in Czechia. Data snapshot 2026-10-10.

See how Ondrej parses inside a full name →