Jacek
Nearly a quarter of a million Polish men carry it, enough to hold a top-100 spot even now. But hardly any boys get it today: just 72 last year, and the count keeps falling. The root is the hyacinth, the spring flower.
Jacek Pronunciation
Jacek is pronounced YAH-tsek (/ˈjat͡sɛk/).
What Jacek means
Where Jacek comes from and what it has meant to the people who carry it.
Jacek grows from Slavic roots, and its short meaning points to the hyacinth, the spring flower. That flower sense was attached later, when the name met the Latin Hyacinthus in the Church calendar. Before then it was a Polish given name with its own plain sound.
The best-known bearer is Saint Jacek Odrowąż, the thirteenth-century Dominican friar sometimes called Hyacinth of Poland. He preached across Kraków and far to the east, and his feast falls on the seventeenth of August, still the name-day for every Jacek. In a school register the name sits plainly among the Js.
Small forms soften it. Family and friends shorten Jacek to Jaś. The older variant Jacenty keeps the fuller, more formal shape, the one you might read on a baptismal record. Set Jacek and Jacenty side by side and you hear the same name in two coats.
Today it reads as solidly mid-century Polish, a name worn by fathers and grandfathers. The flower meaning stays quietly behind it. Jacek: Slavic in root, hyacinth in sense, Jaś to those who love him.
How many people are named Jacek
1 in 93 men in Poland is named Jacek. 229,212 people carry it in the 2025 register: rank #54 among male names.
Jacek's popularity over time
72 boys were given the name in 2025, ranking #286 among newborns. It has been falling steadily since 2000. Still the #54 name among living men, even as it slips to #286 among newborns.
Where Jacek is most popular
Jacek is most popular in Opole, 46% above the national average (29 boys born 2019–2025), followed by Lower Silesian (+27%) and Silesian (+20%). It is least common in Lublin and Subcarpathian, 41% and 40% below average respectively.
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Opole29 boys born+46%
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Lower Silesian86 boys born+27%
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Silesian117 boys born+20%
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Greater Poland106 boys born+15%
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Lesser Poland109 boys born+12%
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Warmian-Masurian34 boys born+10%
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Pomeranian67 boys born+6%
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Kuyavian-Pomeranian49 boys born+4%
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Lubusz21 boys born−2%
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Masovian147 boys born−3%
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West Pomeranian35 boys born−4%
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Podlaskie22 boys born−22%
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Łódź35 boys born−36%
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Świętokrzyskie15 boys born−37%
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Subcarpathian31 boys born−40%
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Lublin26 boys born−41%
Jacek as a middle name
Jacek is a first name for 229,212 men in Poland and a middle name for another 125,250, a 65/35 split. In the men's middle-name ranking it sits 25th, between Robert (129,369) and Ryszard (123,670).
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23
133,181Zbigniew
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24
129,369Robert
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25125,250Jacek
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26
123,670Ryszard
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27
121,294Mateusz
When Jacek celebrates name day
Jacek appears 4 times in the Polish name day calendar. The main date is 10 February.