Sejak

surname · Latin script

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

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

rarermore common
  • CZCzechia1 in 185K(measured from records)
  • SKSlovakia≈1 in 196K

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)

58 people

Sources
10 (measured from records)

Reference-verified

1 in 185K (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 Seják 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

No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.

Where in the world(measured from records)

Sejak 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 Sejak is recorded, by country
CountryMost common spellingSources
CZ Czechia581 in 185K58Seják10
SK Slovakia≈28 est.≈1 in 196K—Seják3

58 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. 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)

Sejak is also recorded as 4 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 Argentina

    Also written Seják

  • a separate name2 spellings in the group

    Also written Seják

  • German surname3 spellings in the group

    Most recorded in Germany, United States

    Languages: German, English

    Also written Seják

  • Hindi surname3 spellings in the group

    Most recorded in India

    Also written Seják

9 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)

Sejak 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.

  • In Indonesian, since

    as a wordkaikki.org Wiktionary extract (IPA + transliterations)

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.

Evidence(measured from records)

No register attests this spelling yet

None of the official registers or reference works in our corpus lists Sejak under this spelling. The statistics on this page rest on person records, and the related names are inferred from the name graph.

Frequently asked questions

In which country does Sejak have the most bearers?
In Czechia, the national register counted about 58 people named Sejak, more than in any other country we hold, where it is most often spelled seják.
Where is Sejak most common?
Sejak is densest in Czechia, where the national register counts about 1 in 185 thousand people carrying it.
How common is the name Sejak?
In Czechia, the national register counted 58 people named Sejak, about 1 in 185 thousand residents.

What do you want to know about Sejak?

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/sejak

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, “Sejak”. Data snapshot 2026-10-10.

See how Sejak parses inside a full name →