Kanstantsin
A Slavic name meaning "constant, steadfast." Around 1,600 men in Poland carry it, and it stays rare: only a pair of boys were given it last year, both in the Mazovia region.
Kanstantsin Pronunciation
Kanstantsin is pronounced kahns-TAHNT-sheen (/kansˈtantɕin/).
What Kanstantsin means
Where Kanstantsin comes from and what it has meant to the people who carry it.
Kanstantsin is the Belarusian form of Constantine, a Slavic shaping of a name that travelled with Eastern Christianity. The meaning behind it, constant and steadfast, goes back to the Latin constans, to stand firm, and that sense followed the name into Slavic speech. So a child called Kanstantsin answers to a word for holding steady.
One Kanstantsin is hard to forget. Kastuś Kalinowski, born Konstanty, led the 1863 uprising against Russian rule and printed a Belarusian-language paper for the peasants before he was hanged in Vilnius at twenty-six. His name became a rallying point for the language itself, and people still call him Kastuś, the homely short form.
In a Polish class register the name is rare, better known there as Konstanty. Trace it back to the root and you reach constans, standing firm, steadfast.
How many people are named Kanstantsin
1 in 12914 men in Poland is named Kanstantsin. 1,653 people carry it in the 2025 register: rank #762 among male names.
Kanstantsin's popularity over time
2 boys were given the name in 2025, ranking #1633 among newborns. It has been climbing since 2024. Still the #762 name among living men, even as it slips to #1633 among newborns.
Where Kanstantsin is most popular
Kanstantsin is most popular in Masovian, 510% above the national average (2 boys born 2019–2025).
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Masovian2 boys born+510%