Kostiuk
surname · Latin script
Meaning: patronymic from a pet form of the personal name Konstanty (see Constant, Constantine)
(measured from records)Officially recorded in 14 countries · latest register: dane.gov.pl, 2026
/koˈsʲtʲuk/(recorded in a dictionary) Ukrainian · from Wiktionary · read from костюк
Kostiuk is a surname written in the Latin script, with more bearers in Ukraine than in any other country, where it is the 61st most common surname.
- PLPoland1 in 12K(measured from records)
- FIFinland1 in 43K
- CACanada≈1 in 74Kfew records
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Kostiuk itself, the figure is that spelling’s, and it is named. 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.
- Ukraine (inferred from the name graph)
- 2 (measured from records)
- Record sources
- 143 (measured from records)
- 1 in 12K (inferred from the name graph)
≈28,000 named Костюк, est.
recorded for this name
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Poland
measured from records inferred from the name graph
Spellings & scripts
(measured from records)Locally spelled Костюк in UA Ukraine, RU Russia, KZ Kazakhstan and 1 more.
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)patronymic from a pet form of the personal name Konstanty (see Constant, Constantine).
Cited for this meaning 1
- Dictionary of American Family Names
Attested across 9 languages in the etymology graph.
Where in the world
(measured from records)Kostiuk 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.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| UA Ukraine | #61 | ≈28,000 est. | ≈1 in 1.4K | — | Костюк | 61 |
| RU Russia | — | ≈13,000 est. | ≈1 in 11K | — | Костюк | 143 |
| PL Poland | — | 3,226 | 1 in 12K | 1.7K | Kostiuk | 35 |
| BY Belarus | #286 | ≈1,900 est. | ≈1 in 4.7K | — | Костюк | 20 |
| KZ Kazakhstan | — | ≈830 est. | ≈1 in 25K | 404 | Костюк | 34 |
| EE Estonia | — | ≈70 est. | ≈1 in 20K | 33 | Kostiuk | 3 |
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: 2021 National Population Census — popular surnames of Russians, by region of residence; dane.gov.pl — PESEL living persons (surnames); 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).
Notable people with this name
(measured from records)- Hryhorii Kostiukb. 1899UASoviet psychologist (1899–1982)
- Mike Kostiukb. 1919USAmerican football player (1919-2015)
- Platon Kostyukb. 1924UAnot in their usual nameUkrainian biologist (1924-2010)
- Valery Kostyukb. 1940RUnot in their usual nameSoviet physicist
- Ihor Kostyukb. 1975UAnot in their usual nameUkrainian footballer
- Iurii Kostiukb. 1977UAUkrainian biathlete
- Maria Kostyukb. 1977RUnot in their usual nameRussian politician
- Sergey Kostyukb. 1978UAnot in their usual nameKazakhstani footballer
- Denys Kostyukb. 1982UAnot in their usual nameUkrainian road bicycle racer
- Marta Kostyukb. 2002UAnot in their usual nameUkrainian tennis player (born 2002)
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)Evidence
(measured from records)25 registers and reference works attest this spelling, across 14 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 1.7K | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 1.7K | #1,619 |
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 1.5K | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 1.5K | #1,912 |
| EE Estonia | Statistics Estonia — per-name Population Register counts (nimed) | — | 15 | #7,570 |
| EE Estonia | Statistics Estonia — per-name Population Register counts (nimed) | — | 14 | #7,886 |
Reference works 4
- Dictionary of American Family Names
- Wikipedia surname tokens
- Wikidata name items (native-script + romanized given/family names)
- Rymut, Słownik nazwisk współcześnie w Polsce używanych (10 vols, IJP PAN, Kraków 1992–1994) — every Polish surname in the PESEL register at the end of 1990, with bearer counts nationally and per voivodeship1990
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 Kostiuk mean, and where does it come from?
- patronymic from a pet form of the personal name Konstanty (see Constant, Constantine). Recorded by Dictionary of American Family Names.
- How do you pronounce Kostiuk?
- In Ukrainian /koˈsʲtʲuk/ (Wiktionary).
- In which country does Kostiuk have the most bearers?
- Mondonomo estimates about 28 thousand people named Костюк in Ukraine, more than in any other country we hold.
- Where is Kostiuk most common?
- Measured as a share of residents rather than as a count, Kostiuk is densest in Poland — about 1 in 12 thousand people — even though Ukraine holds more of our records for it.
- How common is the name Kostiuk?
- In Poland, the national register counted 3,226 people named Kostiuk in 2026, about 1 in 12 thousand residents.
- How common is Kostiuk compared with other names?
- In Ukraine, Kostiuk is the 61st most common surname of 1,177,784 surnames recorded there.
What do you want to know about Kostiuk?
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/kostiukThe 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, “Kostiuk” — the 61st most common surname in Ukraine. Data snapshot 2026-10-13.