Konstiantyn
The Ukrainian form of a Greek name, Konstantinos, that means constant and steadfast. Fewer than 300 men in Poland carry it, so meeting one would stick in your memory. Everyday speech shortens it to Kostek.
Konstiantyn Pronunciation
Konstiantyn is pronounced konst-YAHN-tihn (/kɔnstˈjantɨn/).
What Konstiantyn means
Where Konstiantyn comes from and what it has meant to the people who carry it.
Konstiantyn reached Ukraine through Greek, where Konstantinos carried the Latin idea of the constant and the steadfast. The meaning stayed close to the root. A person so named was marked as one who holds firm.
The Greek Konstantinos honored Constantine the Great, the emperor who moved the Roman capital east and founded Constantinople. From that line the name spread across the Orthodox world, and Ukrainian speech reshaped it into Konstiantyn. Polish kept the nearby variant Konstantyn.
Daily use wears a long name down. Kostek does that work, the short form for a boy written as Konstiantyn in the class register.
The steadfastness was never a later graft. It sat in the Latin constans, standing firm, and it held across every border the name crossed. Under Konstiantyn, and under Kostek, the same word still means constant.
How many people are named Konstiantyn
1 in 81786 men in Poland is named Konstiantyn. 261 people carry it in the 2025 register: rank #1898 among male names.
Konstiantyn's popularity over time
Fewer than 2 boys were given the name in 2025. It has been climbing since 2025.