Male Polish given name · rank 19 among male names (2024)
/ˈkat͡s.pɛr/ · KATS-pehr
Kacper is the Polish form of Kasper (Jasper), most likely derived from a Persian word meaning "treasurer" or "keeper of the treasure". In Polish tradition the name is inseparably tied to one of the Three Kings.
The name spread through medieval Europe thanks to the legend of the Three Wise Men, among whom Kacper brings frankincense to the Christ Child. It is deeply rooted in Poland, and the letters K+M+B chalked on doors at Epiphany still recall its patron; today it ranks among much-loved boys' names.
It most likely derives from the Old Persian ganzabara — "treasurer, keeper of the treasury". The forms Kasper, Jasper and Gaspar arose by the same route.
| Nominative | Kacper |
| Genitive | Kacpra |
| Dative | Kacprowi |
| Accusative | Kacpra |
| Instrumental | Kacprem |
| Locative | Kacprze |
| Vocative | Kacprze |
In Poland, Kacper celebrates its name day on 6 January.
Kacperek, Kacperuś, Kacuś, Kapcio.
Equivalents in other languages include Kasper and Casper (Scandinavian, Dutch), Jasper (English, Dutch), Gaspard (French), Gaspare (Italian) and Gaspar (Spanish, Portuguese).
Since the start of the twenty-first century Kacper has been among the most frequently chosen names for boys in Poland.